Abstract

In the title of his 1980 Dewey Lectures, John Rawls announced that his theory of justice as fairness could be described as an example of “Kantian Constructivism in Moral Theory” (KC). Rawls flirted around 1980 with a strong commitment to Kantian autonomy, only to abandon it as unnecessary to the justification of his theory of justice. The chapter argues that this supposed opposition is based on a serious misunderstanding of Rawls's intellectual trajectory, and especially of the way he understands the Kantian elements of his theory. It shows that, against the assumptions of the familiar debates, Rawls in and after KC, consistently held that the practical aims of constructivism and the philosophical goal of a fully rational justification are not in any sort of tension. Rawls's claims in Political Liberalism and after, and especially his distinction between his political and Kant's moral constructivism, in no way undermine this argument.