There is a more general lesson here. Aquinas shows that the Aristotelian
tradition is superior to the Augustinian by setting up a “dialectical con-
versation” (WJ, 207) between them. He shows that the Aristotelian tradi-
tion can recognize and address the limitations of the Augustinian, while the
Augustinian tradition is unable to address the limitations of the Aristotelian.
More generally, what makes a tradition preferable to its rivals is its ability to
make sense of these rivals in ways they cannot make sense of it. The process
of showing that a tradition can do this is historical.
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It involves tracing the
history of a rival tradition, identifying why the rival has succeeded in some
ways, and explaining why it has failed in others. And it involves developing a
vocabulary that members of the rival tradition can understand, a vocabulary
that can communicate to them the strengths of the other tradition.
Adjudicating traditions in this way is not an everyday occurrence. We do
not usually ask whether one tradition is better than another until an
epistemological crisis confronts us with dramatic evidence of our tradition’s
shortcomings. During such a crisis, MacIntyre argues, we naturally look for
a different way of thinking, one that meets three criteria:
First, this in some ways radically new and conceptually enriched scheme, if it is to
put an end to epistemological crisis, must furnish a solution to the problems which
had previously proved intractable in a systematic and coherent way. Second, it must
also provide an explanation of just what it was which rendered the tradition, before it
had acquired these new resources, sterile or incoherent or both. And third, these first
two tasks must be carried out in a way which exhibits some fundamental continuity
of the new conceptual and theoretical structures with the shared beliefs in terms of
which the tradition of inquiry had been defined up to this point. (WJ, 36 2 )
Aquinas’s “conceptually enriched” Aristotelianism allows him to do all three
of these things for the Augustinian tradition. Aquinas can account for
certain features of the will that had long puzzled Augustinians, such as
56
For a more detailed discussion of this point, see WJ, 360. “Epistemological Crises” anticipates this
claim about the historical character of the process, albeit in the context of a discussion of the
philosophy of science. There, MacIntyre argues that the only way to show that one scientific
paradigm is preferable to another, and that it is rational to choose one over the other, is to engage
in historical study. He claims that “the best account that can be given of why some scientific theories
are superior to others presupposes the possibility of constructing an intelligible dramatic narrative
which can claim historical truth and in which such theories are the subject of successive episodes. It is
because and only because we can construct better and worse histories of this kind, histories which can
be rationally compared with each other, that we can compare theories rationally too” (470).
MacIntyre goes on to argue that this type of historical awareness is what is missing from the
discussions of paradigm shifts by Kuhn and Lakatos: “Without this background, scientific revolutions
become unintelligible episodes; indeed Kuhn becomes – what in essence Lakatos accused him of
being – the Kafka of the history of science. Small wonder that he in turn felt that Lakatos was not an
historian, but an historical novelist” (471).
Search for a method: Whose Justice? Which Rationality? 109