NZSTh 2015; 57(1): 14–31
Paul L. Allen
Sin and Natural Theology:
An Augustinian Framework Beyond Barth
Summary: This article focuses on the question of sin in the context of natural
theology‚ in light of the Barth/Brunner debate. A contemporary notion of sin
would benefit from Barth’s approach, but without his strict doctrine of sin as
nothingness (‘Nichtiges’). Brunner holds to the Augustinian tradition’s claim
that sin is a paradox by distinguishing between the formal and material in the
imago dei. On such a basis, we are able to claim that sin is at least wrongdoing,
anthropologically speaking. A natural theology of sin complements the doctrines
of creation, election and reconciliation while correlating with findings from the
natural sciences.
Zusammenfassung: Dieser Artikel konzentriert sich auf die Frage der Sünde im
Kontext der natürlichen Theologie, im Licht der Barth/Brunner Debatte. Eine
zeitgenössische Vorstellung von Sünde wäre von Barths Ansatz profitieren, aber
ohne seine strenge Lehre von der Sünde als das Nichts (»Nichtiges«). Brunner
hält an der Augustiner-Tradition den Anspruch, dass die Sünde ist ein Paradox,
durch die Unterscheidung zwischen der formalen und Material in der imago dei.
Auf dieser Grundlage können wir behaupten, dass die Sünde ist mindestens
Fehlverhalten, anthropologisch gesprochen. Eine natürliche Theologie der Sün-
de ergänzt die Lehren der Schöpfung, Wahl und Versöhnung, während die Kor-
relation mit den Ergebnissen aus den Naturwissenschaften.
DOI 10.1515/nzsth-2015-0002
Modern theology is still characterized by a chasm between those sympathetic
to natural theology and those who resist it. New movements and schools of
thought (e.g.: analytic theology‚ postliberalism) tend to exacerbate this metho-
dological binary in systematic theology. The touchstone for this longstanding
division remains the famous ‘No’ uttered by Karl Barth to Emil Brunner in re-
sponse to Brunner’s 1934 advocacy of natural theology. Barth famously thun-
ders:
Paul L. Allen: Associate Professor, Department of Theological Studies, Concordia University,
1455 boul. de Maisonneuve ouest, Montreal, CANADA H3G 1M8,
E-Mail:
[email protected]
Sin and Natural Theology 15
“‘natural theology’ does not exist as an entity capable of becoming a separate subject
within what I consider to be real theology … If you really reject natural theology you do
not stare at the serpent, with the result that it stares back at you, hypnotises you, and is
ultimately certain to bite you, but you hit it and kill it as soon as you see it!”1
What appears to be forgotten by many commentators is that sin is what sparked
this episode. The German theological kulturkampf was certainly the backdrop,
but it was not the occasion for the drawn out dispute that Barth and Brunner
engaged in, as their correspondence shows.2 Thus, the most pressing question
to emerge from this is not the general one of methodological bias but rather the
more specific question of how sin should best be understood. Therefore, this
paper explores the contrasting conceptions of sin in Barth and Augustine in or-
der to show that the latter best accounts for the natural predispositions to evil
that come to light in the contemporary natural sciences.
I Introduction
Following Calvin and Augustine particularly, Barth affirms that the human con-
dition is marked by a certain depravity, and it is the whole of human nature
that requires Christ’s redemption. Deprived of being created in the full image
and likeness of God after Adam, Barth warns against any anthropology that
might attempt to minimize the gulf that exists between human creatures and
God.3 For Barth, the uniquenness of Christ suggests that the human imago dei
1 Karl BARTH, “No!” in Natural Theology, transl. by Peter FRAENKEL (London: The Centenary Press,
1946), 75–6.
2 John W. HART, “The Barth-Brunner Correspondence,” in For the Sake of the World: Karl Barth
and the Future of Ecclesial Theology, ed. by George HUNSINGER (Grand Rapids, Mich.: Eerdmans,
2004), 19–43.
3 “… any tenable distinction between man as created by God and the sinful determination of
his being is possible only if his sinful nature, his perversion and corruption, is minimised. But
if we consider man truly and seriously in the light of the Word of God, this is just what may
not be done. His corruption is radical and total.” Karl BARTH, Church Dogmatics, 4 vols. in
13 pts. (hereafter: CD referred to in text) Vol. III, pt. 2: The Doctrine of Creation, trans. By G. W.
BROMILEY and R. J. EHRLICH (Peabody, Mass.: Hendrickson, 2010), 28. Certain analysts of Barth
insist that Barth did not mean that humanity has in fact lost the capacity to image God. This
remains unclear. What is generally accepted is that for Barth, humanity’s imaging of God is not
a capacity per se, but rather a covenant gift bestowed to a dependent humanity who is a coun-
terpart of God’s. But only the person of Christ guarantees this relationship. Qualified in this
way, Barth is read as affirming the imago dei doctrine. See CD III/ 1, 178, 183 ff. For more on this
issue, see Daniel PRICE, Karl Barth’s Anthropology in Light of Modern Thought (Grand Rapids,
Mich.: Eerdmans, 2002).
16 Paul L. Allen
cannot be understood apart from his humanity. And, Barth derives his under-
standing of human nature without a theology of original sin, something which
distinguishes him sharply from Augustine.
It is widely assumed that Barth and Brunner’s positions on sin are irrecon-
cilable‚ but the main tenets of Barth’s theological anthropology may be compa-
tible with a credible natural theology, provided that something like Brunner’s
appeal to the knowledge of sin be taken into account. Brunner is very clear that
sin has not deprived us of the capacity to be faithful and to know about the
created order. In fact, I claim that the contemporary natural sciences provide us
with a great opportunity to follow up on the promise of Brunner’s claim. The
enigmatic aspect of this dispute centers on Barth’s notion of sin as ‘nothing-
ness’, an evasiveness about sin that does not feature in Augustine’s anthropol-
ogy, a contrast I want to explore further. To the extent that Barth’s anthropology
is genuinely coherent with the Augustinian position as I believe it is, then a
major obstacle that currently stands in the way between Barthian theology and
natural theology may be removed.
There are three steps in the argument. First‚ I will consider the essential
aspects of Brunner’s challenge to Barth on the question of sin. Second, the cog-
nate relationship between the anthropologies of Karl Barth and Augustine is
reconsidered. Barth’s doctrine of sin as nothingness (das ‘Nichtiges’) would cer-
tainly require considerable qualification if the Bishop of Hippo’s deft explana-
tion of original sin as transmitted guilt is at all correct. If sin and evil are priva-
tions as Augustine suggests‚ there is more proximity between this view and the
portrait of human behaviour in evolutionary science than to Barth’s anthropol-
ogy. This discrepancy needs to be addressed in a way that is sympathetic to
Barth’s broad aims.4 The doctrine of reconciliation, even of a Barthian sort,
should not have to depend upon the view that sin is strictly nothingness. More
plausibly, Augustine’s claim that sin possesses causal conditions, which is
spelled out in Confessions and in his anti-Pelagian writings, means sin is more
of a paradoxical state than a strict privation of the good. And indeed, Barth’s
own division of hamartiological types in his Church Dogmatics as pride and
sloth constitute the kind of Augustinian claim that supports a limited natural
theology, the very thing Barth apparently dreaded.
Third‚ the contemporary sciences of human nature, which align with an Au-
gustinian idea of inherited sin undoubtedly claim natural inclinations to human
4 Barth’s own account (CD IV/3: The Doctrine of Reconciliation, 177) is that he himself came up
with the term ‘nothingness’ to describe sin and evil’s ontological status. I contend that this is
difficult to conceive of this on an Augustinian influence and given his own extensive discus-
sion of sin as the ’form’ of pride and sloth in CD IV/1 and IV/2 .
Sin and Natural Theology 17
wrongdoing. So, contrary to the usual view that Barth and the sciences of nat-
ure have no point of contact, I take it that the contemporary evolutionary anthro-
pology is reconcilable to a strong view of sin, although not to ‘nothingness’.
The place of sin in a Christian narrative of human existence is essential for an
account of Christ and his atoning work, regardless of whether that narrative
precedes or follows on from that which concerns revelation.5 Anyway, T.F. Tor-
rance’s sage assessment is that it is not the rational character but the alleged
independence of natural theology that most bothered Barth.6 His emphasis on
the judgment of God does not entail foreclosing on the ability of the sciences to
say something truthful about humanity, despite the fact that Barth himself re-
fused to allow for a theological rhetoric of natural data bearing on humanity’s
created character.
II Brunner and the Augustinian Barth
As is well known, Emil Brunner claims that a natural theology is possible as a
consequence of there being two revelations, a general (natural) revelation and
that of Christ. For Brunner, the possibility of a natural theology exists so long
as it is conceived neither as a philosophical enterprise nor as a more fundamen-
tal basis on which the special revelation of Christ is subsequently built. Echoing
historic Protestant tradition, Brunner claims that our preservation through God’s
grace is possible because our ability to image God is still maintained in a formal
way, whilst we have lost our capacity to image God in a material sense.7 We will
return to this matter/form distinction a bit later, because on it much depends.
The specific aspect of Brunner’s theological anthropology to which Barth
objects in their initial exchange is the proposition that the human being is a
point of ongoing contact between God and the world. According to Brunner,
this issue of point of contact or „human capacity“ is essential for ethics. We
need to explain how God’s created world contains a first and vital grace if we
5 This arises from a reading of Wolf KRÖTKE, “The humanity of the human person in Karl
Barth’s anthropology” in The Cambridge Companion to Karl Barth, ed. by John WEBSTER (Cam-
bridge: Cambridge Univ. Press, 2006), 159–176, especially 159–60.
6 T. F. TORRANCE, “The Problem of Natural Theology in the Thought of Karl Barth,” in Religious
Studies 6 (1970), 121–135, here 128.
7 See the narrative of Brunner and Barth’s debate in Andrew MOORE, “Theological Critiques
of Natural Theology” in The Oxford Handbook of Natural Theology, ed. by Russell Re MANNING
(Oxford: Oxford University Press, 2013), 227–244.
18 Paul L. Allen
are to be taken seriously in making moral claims.8 The other point, which Barth
brushes aside, is the pedagogical value of natural theology.
Brunner justifies his position through well known references, such as the
one concerning Calvin’s equating of the lex naturae with the order of creation
(Brunner, 37) and Paul’s own assertion in Rom. 1–2 – originating with Old Tes-
tament Judaism – that God’s glory is evident in his works (Brunner, 61). Of more
importance is Brunner’s assertion that “Barth’s Dogmatics, like all others, are
of course based on the idea of analogy, even though he does not acknowledge
this … the formal imago Dei, which he so much dislikes, i.e. … the doctrine that
man as we know him, sinful man, is the only legitimate analogy to God, be-
cause he is always a rational being, a subject, a person.” (54).
Brunner later claimed that there was little space between his account of the
‘point of contact’ and Barth’s account. He cited Barth’s writing from 1948 and
which appeared in vol. III, 2 of Barth’s Church Dogmatics.9 Yet, Barth himself still
held for a serious difference – on both it and on the related question of a gener-
al revelation in a short yet pointed section of the later Church Dogmatics III,2:
“that man can sin does not seem to be for Brunner a possibility alien to his true crea-
turely being, but one which is integral to and foreseen and prepared in it … As I see it,
it is impossible to maintain at one and the same time the concept of man constituted by
the Word of God and the idea of a neutral capacity in man.”10
Sin is only rebellion for Barth and cannot in any way be a part of creaturehood.
This tension is not a paradox (as I will show it to be for Augustine) but is in-
stead a metaphysical chasm. Barth dissociates the ‘phenomena of man’ with
what he terms ‘real Man’, leaving no doubt that he thinks Brunner’s qualifica-
tions on human nature means that the phenomena of man is a weak conceptual
terrain from which to do a proper theological anthropology: “it is at least an
open question whether even in Brunner’s anthropology we are within the limits
within which we can finally know not merely the phenomena of the human but
real man himself.”11
Here is where we see the first serious problem with Barth’s treatment of
sin. The philosophical distinction between ‘phenomenal’ and ‘real’ in Barth’s
8 “[T]he theologian’s attitude to theologia naturalis decides the character of his ethics.” Emil
BRUNNER, “Nature and Grace” in Natural Theology, 51.
9 Emil BRUNNER, “The New Barth: Observations on Karl Barth’s Doctrine of Man,” in Scottish
Journal of Theology vol. 4, n.2 (June, 1951), 123–135. Cf. BRUNNER, Man in Revolt (Philadelphia:
The Westminster Press, 1947).
10 Ibid, 131.
11 Ibid, 132.
Sin and Natural Theology 19
anthropological dogma is a dominant feature of the Church Dogmatics. It is fair
to speculate that Kantian transcendentalism has been smuggled in at this point
to keep theological discourse pure from philosophical taint, but in rendering
this service, the real/phenomenal distinction manages to conceptualize human
reality in a thoroughly philosophical framework, ironically. In fact, Barth breaks
his own rule. Of course, Barth’s aim is to equate the real Man with Jesus, who is
the measure of man. Therefore, there is an additional critical question on this
real/phenomenal distinction that must be addressed. Perfect humanity and cre-
ated humanity are the two sides of the distinction that Barth is trying to uphold,
and for good reason, since in opposition to liberal Protestantism, Barth seeks to
remedy the smug self-satisfaction that is implied in a concept of humanity that
does not recognize the primacy of grace and redemption from sin. Nevertheless,
Barth goes too far in equating the essence of the humanum with the one perfect
human. It is not clear why the theological desideratum of humanity’s created
stature before God remain bereft of those understandings that lies apart from its
pure theological conception.
I want to claim that Barth collapses the understanding of humanity into a
judgment about humanity. This conflation rests on a kind of category mistake,
a theological determinism of the real over the apparent. It is one thing to under-
stand human nature, with all of its tensions and contradictions, and it is an-
other thing entirely to judge human nature in the light of the grace of Jesus
Christ. And I think it is simply the case that Barth was overly anxious to present
the latter at the expense of the former. As with so much theological dialectics,
the question of emphasis can be taken via dialectic to be a rhetoric of exclusion
of certain insights or concepts about which one would not otherwise be op-
posed. It is one thing to assert the need for a single Christian theological frame-
work as Barth did. It is another thing altogether to assume that data from the
natural world or from the social sciences is always destined to be irrelevant to
it. And it is strange too, since Barth does not need this methodological step in
order to claim the real man Jesus as the criterion for the judgment of humanity’s
sinfulness. Barth may even retain the language of sin’s diabolical character
without negating the causes and explanations for sin that might reasonably be
ascertained from within the created order.
Within the Church Dogmatics, Barth takes up sin within the parameters of
his doctrine of reconciliation. The stage is set earlier in his treatment of the
doctrine of creation in CD III,1 where Barth opens up a distinction between
Schleiermacher and Augustine on the created self. Here, he draws a contrast
between Schleiermacher’s knowledge of creation on the basis of self with Au-
gustine’s rather different notion of sheer dependence, articulated in Confessions.
This contrast is one of several important steps along the way to his rejection of
20 Paul L. Allen
Brunner’s overtures in III,2.12 The bifurcation that Barth critiques in Brunner is
foreshadowed in his lashing of Schleiermacher’s acceptance of the creation dog-
ma on the basis of a projection of the self’s dependence upon God. The contrast
between Augustinian and Schleiermacherian notions of dependence, two en-
tirely distinct anthropologies, provides a vivid distinction of different anthropo-
logical impulses in the Christian church.
Barth’s portrait of sin places a great emphasis on its Augustinian character:
“Sin is … not merely an evil, but a breach of the covenant which as such contra-
dicts God … Sin is man’s denial of himself in face of the grace of His creator.”13
Barth likens the understanding of human nature without Christ to the situation
of a novice swimmer who, having been saved from drowning by a strong swim-
mer, thinks that his being human instead of being a “lump of lead”, explains
his salvation.14 Pride, alongside sloth, are the major themes in Barth’s devel-
opment of a notion of sin in the Church Dogmatics. Barth’s willingness to de-
scribe sin is telling however. The conclusion one might draw even at this preli-
minary juncture is to claim that he clings to an Augustinian sense of paradox.
With Augustine, Barth believes sin to be an “impossible possibility.” But, the
Barthian paradox allows for no truly anthropological dimension: “there is no
law and commandment of God inherent in the creatureliness of man as such, or
written and revealed in the stars as a law of the cosmos, so that the transgres-
sion of it makes man a sinner.”15 Against Augustine then, sin is not a violation
of a natural law. It is not a logical outcome of a human inclination that we
might deduce from the norm of any given set of potencies in human nature.
Barth stretches Augustine’s paradox to a breaking point by pushing his dis-
cussion of sin as nothingness‚ in which sin perdures as a ‘real correspondence’
to God’s ‘No”. It is allowed by God to continue, yet it is conquered by the one
perfect man, Jesus.16 Hunsinger summarizes Barth thus:
“Sin (and sinful human beings) existed in a netherworld of unreality. Sin’s origin was
inexplicable, its status was deeply conflicted, and its destiny was to vanish. Meanwhile,
it was actually there and had somehow to be taken into account, but (being essentially
absurd) it could only be described in paradoxical terms.”17
12 CD III/1, 8–10.
13 CD IV/1, 140.
14 Ibid, 79.
15 Ibid.
16 CD III/3, 352 and 360ff.
17 George HUNSINGER, How to Read Barth: The Shape of His Theology (Oxford University Press,
1991), 39. As unreal, sin’s provenance and its power are non-existent to the point where we are
right to question how we may understand the reasons for our salvation.
Sin and Natural Theology 21
Barth comments elsewhere that “to try to find a reason for it is simply to show
that we do not realize that we are talking of the evil that is really evil.”18 Cer-
tainly, Barth’s interpretation of sin parallels the privatio boni view of sin and
evil, a scepticism toward giving sin any ontological status whatsoever is consis-
tent with Augustine and Paul.
However, I think this consistency is undermined by the fact that reasons
can still be given for sinful actions. Barth’s paradoxical portrait of human nat-
ure establishes sin as an abstraction in contrast to the concrete expression of
God’s Word in Christ. This impression is solidified through his distinction be-
tween the phenomenal man and the real Man in III, 2, the very point at which
he fixes his glare on Brunner’s anthropology in order to undermine it through a
series of relentless questions (“Is there in the Word of God, in Jesus Christ, an
indecisiveness which enables man to use his freedom otherwise than in grateful
obedience to God’s gracious action?” etc.19)
Barth’s challenge to Brunner’s position lies in his difficulty with the idea
that despite sin, we are still made in the image of God, however imperfectly.
Barth appears to accept this idea, but it may be a nominal sort of affirmation.
Perhaps a stronger imago dei would be seen to compete with the perfect Man,
Christ. On the other hand lies Augustine’s traducian understanding of a biolo-
gical inheritance, a material cause in nature which, however clumsily from our
perspective, powerfully undermines a human nature that God has created as
a reflection of himself. Barth’s portrait of human nature under judgment is
precisely an issue of how our human nature – as we understand it – is to be
judged. It is not another kind of understanding. Barth’s response seems almost
designed to ensure that he will talk past Brunner, which is what Brunner reports
to have taken place in fact. The main reason for this miscommunication, I be-
lieve, is that Barth refuses to understand human nature as a matter for human
understanding.
The methodological rationale for his denial of Brunner’s natural theology is
a motivating factor, but it undermines Barth’s commitment to the imago dei. In
the background is the distinction between noetic reason and ontic reason, a dis-
tinction that specifically divides human knowledge (of ourselves) from that
which is true about human beings as such.20 But lingering questions raise doubts
18 HUNSINGER, 133. Cf. BARTH, CD IV/2 415–416.
19 CD III/2, 130.
20 Karl BARTH, Anselm: Fides Quarens Intellectum; Anselm’s proof of the Existence of God in the
context of his thelogical scheme (London, SCM Press, 1960). See the illuminating discussion of
the noetic/ontic distinction in Hans Urs VON BALTHASAR, The Theology of Karl Barth (San Fran-
cisco: Ignatius Press, 1992), 156–161.
22 Paul L. Allen
over Barth’s rush to judgment. Has Urs von Balthasar raises several points in
his great study of Barth, two of which are relevant here: the continuity of our
identity even subsequent to our re-birth in Christ and the tacit acknowledge-
ment that sin has not destroyed whatever it is that undergoes momentous
change in the act of faith because these are not two different persons in the
end. Theology, as the science of that which measures humanity, is even analo-
gous to the other sciences in this regard as well – to measure something is not
an a priori act, since it assumes some basic knowledge of the features of that
which is being measured.
In cordoning human nature within the methodological fixity of a theology
of revelation, Barth misses the basic human contradiction as a contradiction ly-
ing within our created nature. The problem is the misfit of matter and form to
which the solution of grace should not imply an erasure of the problem in its
particulars. As both Paul and Augustine attest so ably, sin remains as a form of
slavery in opposition to Christian freedom (cf. Gal. 5), but the moral, anthropo-
logical dimensions of this tension are heightened not abstracted by this dy-
namic. And this is why Barth’s rendering of sin, especially within a Kantian
metaphysic of human identity, in response to Brunner’s outline of natural theol-
ogy – as it is conducive to a serious reading of salvation history – is so proble-
matic.
III An Augustinian Alternative
Here, Augustine can aid us in moving beyond Barth’s hasty rejection of natural
theology.21 It is sometimes forgotten that Augustine’s formulation of original
sin is partly an explanation for the unmerited suffering of innocent persons. It
is, of course, designed to show that natural evil is but an effect of the sin of
Adam, which has infected not only our bodies but the entire natural order. The
status of the sin in the disputation between Augustine and his Pelagian oppo-
nents, especially Augustine’s correspondence with Julian, bishop of Eclanum is
instructive. For Augustine, the fall translates into the spread of natural evil
throughout the cosmos, with the positive implication that God cannot be blamed
for natural evil. Against Augustine, Julian argues “If sin, then, is natural, it is
not voluntary, it is not inborn. These two definitions are as contrary to each
21 For a superb analysis of Augustine’s understanding of sin in his various works, see Ian
A. MCFARLAND, In Adam’s Fall: A Meditation on the Christian Doctrine of Original Sin (Malden,
Mass.: Wiley Blackwell, 2010).
Sin and Natural Theology 23
other as necessity and will are contrary …”22 For Julian, sin is something com-
mitted through an exercise of the human will. It can neither be naturally inher-
ited nor seen as a condition for the possibility of sin within the workings of the
human body.
Julian sets out a thoroughly subjective view of sin (and suffering) against
Augustine’s ‘objective’ account. And against the doctrine of original sin, Julian
hypothesizes that the fall of Genesis 3 is a narrative that projects human loss
and the feeling of being cursed onto nature. By extension, children cannot sin,
since they do not possess a full human will. Augustine, on the contrary, insists
that there are sinful causes of suffering in the world. The guilt we feel as a con-
sequence of sinning is also God’s punishment for Adam’s sin. Sin, both in terms
of its originating cause and its material causes is inordinate desire. It is the evil
of seeking a good in disproportionate terms. This is what Augustine suggests
through the use of the term concupiscence. It is coated with the sweetness of
life’s solaces:
“Human friendship also is endeared with a sweet tie, by reason of the unity of many souls.
Upon occasion of all these and the like, is sin committed, while through an immoderate
inclination towards these goods of the lowest order, the higher and better are forsaken, –
Thou our Lord God … When then we ask why a crime was done, we believe it not unless it
appear that there might have been some desire of obtaining some of those which we
called lower goods, or a fear of losing them.”23
And, partly because desire for lower goods expresses itself from such an early
age, Augustine’s theology of baptism is infamous for considering a human baby
to be in a calamitous state of sin. But, Augustine’s claim that sin causes both
suffering and death is interesting for the way in which he expresses this reality
as something that comes about, at least initially, as a desire for a good. Sin,
then, is not exclusively to be seen as a demonic effect of an evil power upon us,
but rather as something that is also an emergent presence of a privation that
arises from wanting too much of the goods of this life. To reduce the latter to
the former seems to me to miss an important distinction between sinful beha-
viour and sinful behaviour that participates in spiritual evil.
In satisfying the body’s otherwise good desire (for food or sex), we can en-
gage in gluttony or lust. Such disproportionate loves are effects of proximate
cultural or genetic causes, and while some might disagree over the moral impli-
22 AUGUSTINE, Answer to the Pelagians III: Unfinished Work in Answer To Julian, ed. by John
E. ROTELLE, O.S.A. (Hyde Park, New York: New City Press, 1999) Pt. I, vol. 25, Book 4, 458. Cf.
the discussion in Elaine PAGELS, Adam, Eve and the Serpent (Random House, 1989).
23 AUGUSTINE, The Confessions (New York: Touchstone, 1997) Book II, 5: 31.
24 Paul L. Allen
cations attached to either, assent to the presence of natural causes for the kind
of behaviour that such words denote would not surprise a modern person. To
participate in evil is to move beyond the inordinate desires for the good toward
active hostility to all of that which is good. But as Augustine himself allows,
involuntary impulses that bind the human will in concupiscence do not negate
human freedom. The tension that arises between virtue and vice is a classical
Augustinian theme, and its significance here lies in defeating the view of sin as
an overly abstract privation of the human will, which we see in Karl Barth.
Let’s place this argument in fifth century terms. My argument is that we can
concede to Julian the goodness of creation, while we ought to concede to Au-
gustine an absence (or privation) of good in the world. We are correct to sym-
pathize with Augustine more than Julian due to the apparent natural, evolution-
ary inclinations behind vice and misbehaviour. We should not concede to
Julian the naive, Pelagian view of sin as mere social imitation as contemporary
theological liberalism is wont to do.
Yet, we ought to be extremely cautious of doing anything more than corre-
lating suffering and death with God’s punishment for original sin. That is, if we
claim that God punishes human kind by establishing proximate causes for their
sin seems, prima facie, to be extremely problematic. Leaving aside the question
of divine punishment, Augustine certainly maintained that original sin’s effects
are themselves natural evils that cause sin. We could interpret such a claim to
cover instances of genetic/hormonal predispositions to aggression, sexual pro-
miscuity or slothfulness. So, if, instead of ascribing such a thing to God, we
escape the traps of that argument by simply saying that there are predisposi-
tions to vice in human nature. However, such predispositions, while causal and
necessary for many sins to occur, are nevertheless insufficient causes of sin.
Thus, we retrieve Augustine’s sense of the involuntary elements of sin and God
is not invoked as a direct or even an indirect cause of natural evil. We avoid the
sharp Pelagian discrepancy between human nature and the will, which we
know to be false on philosophical and on scientific grounds. We also avoid the
Barth/Kant distinction between the phenomenal (natural) and Real Man, since
our nature – and the moral deliberation that goes with it – is as real as the
judgment that God will issue against human sin if and when we fail at moral
deliberation.
Sin and Natural Theology 25
IV Contemporary Support for Augustinian
Natural Theology
If Augustine’s alternative model of human sin, albeit with amendments, is to
gain a foothold in contrast to that of Barth’s, one element in its favour is the
traction it gains among the natural sciences. Correlation with the natural
sciences is not a proof or even a necessary desideratum for an adequate notion
of sin, and for reasons of theology’s integrity as a way of reflecting on faith on
its own terms, it is important to say so. Yet without an account of sin that sug-
gests something like wrongdoing, the mission of the Christian church will be
found wanting. And we need to reject as well the idea that any knowledge of
the etiology of sin automatically excludes dealing with sin as a problem of the
will. An Augustinian framework would be strengthened in its response to
Barth’s notion of sin, but such strengthening depends in large part on not fall-
ing into the trap of avoiding the problem of sin by examining its origins. Barth
seems to have believed that there is a choice to be made on this point. However,
in the science-theology dialogue, human sin is not as widely examined as the
more generic themes of evil, suffering and theodicy. To the extent it has been
treated, a popular option has propounded the easy but entirely false idea that
we should “replace the doctrine of original sin with a scientific understanding
of human nature.”24 Other similar scholarship in the science-theology dialogue
tends to specialize on questions of ethics that take for granted the seriousness
of evolution without the requisite seriousness being devoted to how sin could
be a fundamentally distinct concept from that of wrongdoing. These kinds of
developments are based largely on the yet more voluminous scholarship which
tends to take evolution as a grand narrative for constructing a portrait of human
nature without any references to God or sin.
Let us look briefly at a couple of examples of these problems, for they de-
monstrate analogous difficulties which bind Barth’s interpretation of sin and
anthropology. First, within the field of primatology, the work of Frans de Waal
stands out. De Waal argues strongly against what he terms the “veneer theory”
model of human nature, according to which the immoral core of human nature
is surrounded by a façade of moral goodness. He argues instead for the essen-
tial goodness of human nature that is especially evident in acts of cooperation.
There is also an important continuity of this human goodness with non-human
24 See Patricia WILLIAMS, Doing Without Adam and Eve: Sociobiology and Original Sin (Min-
neapolis, Minn: Fortress Press, 2001), 142. Cf. Stephen R. L. CLARK, Biology and Christian Ethics
(Cambridge: Cambridge University Press, 2000).
26 Paul L. Allen
mammals, especially the bonobo chimpanzees with whom we share a relatively
larger genetic inheritance. He cites the ability of bonobo chimps to adopt the
viewpoint of other chimps and even individuals of other species. His research,
as with others in fields such as evolutionary psychology and sociobiology, deals
with behaviours known as kin selection and reciprocal altruism. These terms
identify what can be thought of as proto-virtuous behaviours, naturally prompted
cooperative behaviour toward those who share genetic lineage or those whose
potential to return our favour is present.25
There are weaknesses to inferring to human behaviour patterns on the basis
of animal behaviour patterns of course. As Mary Midgley puts it, “everyone
knows that animals are as incapable of vice as they are of virtue.”26 Notwith-
standing basic species differences, De Waal seems to suggest that altruism and
pro-social behaviour are natural dispositions because they are analogously pre-
sent in other animals. According to him, sinful behaviour (or wrongdoing, since
de Waal does not introduce a theological interpretation to his own work) is cul-
turally triggered. In a vivid sense, this kind of interpretation seems to be noth-
ing more than a resuscitation of Jean Jacques Rousseau’s noble savage with the
addition of a primatological perspective. But, for all his talk of empathy and
citations of Humean moral sentiment, I think de Waal means to convey an idea
that is fatally simplistic. His research does show that kindness is not something
that is utterly unique to our species. And, morality is derived from the passions,
not cold, dispassionate reason, or at least not exclusively the reason that we
associate with higher order functions of the neocortex. What I do not think de
Waal’s research has demonstrated however, is that such pro-social inclinations
form the exclusive core of human nature. Again, the problem lies in projecting a
tension between some core and periphery in human nature, rather along the
lines of Kant’s/Barth’s real/phenomenal distinction. While sharing none of the
contents of the separation between the phenomenal and real human, de Waal
and Barth share the basic idea that humans are ontologically divided.
25 “[E]volution favors animals that assist each other if by doing so they achieve long-term
benefits of greater value than the benefits derived from going it alone and competing with
others. Unlike cooperation resting on simultaneous benefits to all parties involved (known as
mutualism), reciprocity involves exchanged acts that, while beneficial to the recipient, are
costly to the performer. This cost, which is generated because there is a time lag between giv-
ing and receiving, is eliminated as soon as a favour of equal value is returned to the perfor-
mer.” Frans DE WAAL, Primates and Philosophers: How Morality Evolved (Oxford/Princeton:
Princeton University Press, 2006), 13. These terms are associated with the work of evolutionary
theorists W. D. Hamilton and Robert Trivers.
26 Mary MIDGLEY, Beast and Man: The Roots of Human Nature, (London: Routledge, 1995), 31.
Sin and Natural Theology 27
While there would seem to be a great deal of genetically prompted potential
toward altruistic behaviour‚ caution is in order over what is meant by altruism.
There is the potential for an unchecked bias among researchers such as de Waal
(notably in their efforts to express the meaning of their scientific work to a
wider public) that supports a view of behaviour that supports the modern belief
in human perfectibility. Perhaps this is a political bias in seeing evolution’s
happy consequences.27 Perhaps there is a cultural disinclination to consider the
unhappy consequences of kin selection and reciprocal altruism. Namely, there
is an inevitability toward vices in situations where favour is invariably, dispro-
portionately shown toward related kin in place of others. Not coincidentally,
the tribalism that this natural tendency to favour one’s own ‘type’ of human is,
when taken to extreme lengths, precisely the root evil that Barth’s refusal of
Nazism signifies.
It is‚ however, more than a stretch to allege a relation between common acts
of cooperation and despotic racism. Nevertheless, troubling questions haunt
standard social psychology because of the evolutionary etiology of distinct
kinds of behaviour from similar material causes. Evolutionary psychologist Ri-
chard Alexander asks: “Is cooperation always a form of competition? Is gener-
osity and congeniality always but one side of the ‘coin‚’ the other side being
competition between groups that are congenial within themselves?”28 Doesn’t
“within-group amity” tend to be “between-group enmity”?29 There cannot be
strict altruism. One of the difficulties in discussing altruism is the tendency by
some to forget that it is human behaviour that is being described. Human be-
haviour cannot be reduced to being an effect of a single genetic or cultural
cause. It is invariably motivated by a mixture of causes. The human phenotype
includes culture within a statistically recurrent gene-culture relationship across
populations. In the past, nature/nurture debates tended to perpetuate a false,
misleading understanding of core and periphery in human nature. There is no
nature/nurture divide as recent interpretations of Darwinian evolution have
clarified – gene/environment communication is operative to a very low level of
molecular biology. The metaphor of the ‘selfish gene’ coined by Richard Daw-
27 See the discussion of ‘positive’ and ‘negative’ morality‚ and an assessment of de Waal’s
position on the latter in James BLACHOCICZ, “The Beginning and End of Negative Morality: An
Evolutionary Perspective” in The Philosophical Forum (2008), 21–51.
28 Richard ALEXANDER, “The Challenge of Human Social Behaviour” in Evolutionary Psychology
2006 n.4, 1–32. [http://www.epjournal.net/filestore/ep04132.pdf] First accessed May 5, 2010.
29 Attributed to Alexander by Robert WRIGHT, “Ethics for Extraterrestrials” in The New York
Times May 4, 2010. [http://opinionator.blogs.nytimes.com/2010/05/04/the-moral-alien/?_php=
true&_type=blogs&_r=0 ] First accessed May 4, 2010.
28 Paul L. Allen
kins is both as true as the metaphor of the sharing gene. But it is more impor-
tant to affirm that no gene is selfish if by that term we ascribe agency to it.
As I suggested earlier, the philosophical distinction that might untie the
Gordion knot is the matter/form distinction. It is essentially a corrective to de
Waal and others who view human nature as a binary of core and peripheral
predispositions. And by extrapolation, the provision of the matter/form distinc-
tion to human nature is certainly a correction that is relevant to Barth’s binary
anthropology too. It is here then that we must point specifically to Brunner’s
own use of the distinction between matter and form as the natural theology im-
plied by the imago dei doctrine that does not violate the theology of revelation
and election that Barth upholds. According to my analysis, Barth’s real/phe-
nomenal alterative is as dualist as a naturalist anthropology as de Waal’s or
other naturalist views that hold out the independence of moral agency.
One other illustration from the world of evolutionary psychology will suffice
to draw forth the importance of the matter/form distinction within a natural
theology. Some new research into theft, rape and other criminal activity sug-
gests that whatever selection pressures lead to cooperation, there is “significant
selection pressure for the evolution of strategies to best others in contexts of
conflict over scarce resources, including competition for attractive mates and
territories.” These pressures have in turn led to numerous, sometimes compet-
ing adaptations between individuals who are engaged in “cost-infliction and
defenses against victimization locked in a perpetual, antagonistic, coevolution-
ary arms race across generations …”30 Violence, therefore, can be seen as not
merely learnt, but also naturally prompted. Claims that link violence with genet-
ic predisposition are important to assess, even though it is true that genetic cau-
sation is never direct but rather mediated through a large-scale interaction of
many genes, morphological capacities and environmentally triggered bodily re-
sponses. Regardless of the trajectory of these forces, it is understandable why
moral philosophers turn to virtue theory to fill out a natural law account of mor-
ality.31 It is less easy to see the theological benefit of such evaluations of moral-
30 Joshua D. DUNTLEY and Todd K. SHACKLEFORD, “Darwinian foundations of crime and law” in
Aggression and Violent Behavior 13 (2008) 373–382, here 374. For a summary of the evidence for
genetic predispositions to criminal and other immoral behaviour, as well as that of human free-
dom to countervail these predispositions, see Ted PETERS, Playing God: Genetic Determinism
and Human Freedom (Routledge, 1997), chap. 3.
31 See Craig BOYD, A Shared Morality: A Narrative Defense of Natural Law Ethics (Grand Ra-
pids, Mich.: Brazos Press, 2007). Natural law theory has grappled with evolution in an increas-
ingly sophisticated way and Larry Arnhart, a non-theist, is a leader in this way of thinking. See
ARNHART, Darwinian Natural Right: The Biological Ethics of Human Nature (Albany, New York:
SUNY Press, 1998).
Sin and Natural Theology 29
ity, if the imago dei concept has been abstracted a priori beyond the form of the
human in tension with material causes for sin. It is tempting, although false, to
take away from empirical research into either the cooperative good or the com-
petitive evil, a simple affirmation or negation of the imago dei. Neither of these
options are suitable theological interpretations of our natural predisposition,
unless that interpretation be situated within an adequate anthropological frame-
work that is inherently open to God’s revelation. And it is nothing less than this
stance that Brunner was trying to uphold.
V Conclusion
I want to suggest therefore that Barth could have articulated a natural theol-
ogy of sin – in the way that Brunner suggested – within an account of God’s
grace without sacrificing the sharp difference that revelation was intended to
protect. This claim might seem audacious, since some of Barth’s defenders be-
lieve that he did not forsake his earlier repudiation of natural theology in his
later thought.32 However, I read Barth through the lens of von Balthasar, Tor-
rance and others, as a view that can allow for the potential of a natural theol-
ogy that takes seriously the reality of nature.33 However, by forbidding natural
theology, Barth prevents a full picture of human nature to emerge, for which
his depiction of divine grace is a nevertheless ringing, true answer.
In this light, I think Barth’s theology of sin could have been further revised,
or at least reframed, in order to emphasize what Augustine understands in his
concept of sin. That concept recognizes the power of sin’s material causes that
do not eliminate the good of human nature, which retains its formal capacity to
reflect the goodness of God as an image of God.
There are material conditions for the possibility of sin. The causal pathways
between elements that are traditionally understood as strictly natural and those
that stem from the social environment are complex yet they pertain to the real
person‚ not a phenomenal approximation of the real person. The caveat to this
claim is the sinlessness of Christ, a claim that is made more plausible in the
light of the matter/form distinction. With only an abstraction (i.e.: ‘nothing-
32 See Keith JOHNSON, Karl Barth and the Analogia Entis. (London: T & T Clark, 2010).
33 In a letter dated May 7, 1968, Barth reportedly speaks of nature as “a proof for God.” See
Geoffrey Bromiley, trans., A Late Friendship: The Letters of Karl Barth and Carl Zuckmayer
(Grand Rapids, Mich., Eerdmans, 1982), 42. The letter is dated May 7, 1968. Cf. Eugene ROGERS,
Thomas Aquinas and Karl Barth: Sacred Doctrine and the Natural Knowledge of God (Notre
Dame, Ind.: University of Notre Dame Press, 1995), 7 and 217.
30 Paul L. Allen
ness’) to denote that which Christ avoided, his human nature is not satisfacto-
rily described as the struggle which the gospels do, in fact, describe. And while
my argument for a natural component of sin echoes G. K. Chesterton’s and Rein-
hold Niebuhr’s claim that Original Sin is the most empirical doctrine of the
Christian tradition, it does not entail that additional claim.
In his exchange with Barth‚ Brunner states: “Without knowledge of God,
there can be no sin.”34 It is common and correct to cite sin as a breakdown in
the vertical relationship between ourselves and God. While no revision of this
claim is foreseen here, nevertheless if we take seriously the ramifications of a
natural notion of sin, then we can say two things. First, the material causes of
sin contain a breakdown in horizontal personal relations. Barth’s ‘nothingness’
adds only a little to the loss that such breakdowns entail. What is also clear is
that an understanding of the etiology of sin does not imply a lack of willingness
to combat it, which is the fateful inference that Barth makes in his stress on
God’s grace in the triumph over the nothingness of evil.35
Second, but more controversially, sin is to be understood as a prolegomena
of despair to the knowledge that faith brings. This follows from the fact that
many types of sin, whether particular acts or general vices such as sloth and
pride possess an etiology. But, those vices, misdeeds and wrongdoing in gener-
al only become sin once the true remedy to their existence is known. Again,
with Barth and the whole tradition, it is necessary to have recourse to God’s
saving plan when a remedy to sin is sought, as indeed it must be.
The paradox of human nature is that we sin whilst remaining a creation in
the image of God. Significantly, human paradox is self-contradiction, as Barth
reiterates himself.36 But it does no good to suppose, as Barth does in his reflec-
tion on nothingness in CD III/3, that “any theoretical synthesis we contemplate
between creaturely existence and genuine nothingness can only be a descrip-
tion of its triumph over creaturely existence …”.37 In his rush to suppress a nat-
ural theology synthesis, he misperceives any attempt to account for sin as a
smuggled liberalism. By replacing Augustine’s sense of privation and inner
paradox with nothingness as his own synthetic concept, he misses an opportu-
nity to broaden the scope of the self-contradiction he cites. And this is why it is
important to try to interpret Barth’s thinking in line with Augustine. This is a
risk that must be adopted if we take seriously the witness of biblical authorities,
34 BRUNNERS, “Nature and Grace”, 32.
35 CD III/3, 349–368.
36 CD IV/2, 409: “The man who contradicts God and therefore contradicts and hopelessly jeo-
pardises himself.”
37 Ibid, 303.
Sin and Natural Theology 31
Augustine and the testimony of contemporary biological science into account in
our theological method.
In conclusion, theological accounts of sin and purely philosophical ac-
counts of wrongdoing cannot be separate accounts. Nor should they be mu-
tually exclusive accounts. For those inclined toward natural theology, Barth’s
warning of academic pride is a welcome message of due humility before the
singular act of redemption Christ wins in defeating sin and death. Inasmuch as
we are actually able to understand ourselves as agents of sin as contemporary
science inclines us to hold, we may say that Barth’s dismissal of any philoso-
phical tool that enlightens this aspect of human nature is mistaken. To push sin
into the realm of the absurd or into an unthinkable abyss does nothing to enrich
the Christian message of salvation from sin. Sin is not absurd, it is often highly
rational and evil is parasitical through material causes. In Darwinian terms, it
can even be predicated on the unintended twin goals of survival and reproduc-
tion. And these kinds of considerations ought not to be abstracted from view at
a moment in our civilization when their role in human behaviour is ever more
present in our collective consciousness.