Another quote from the John Rawls book review we linked this week:
What makes belief in inviolable or natural rights reasonable? It is not enough to argue that each individual possesses an inalienable inviolability because all are, as Rawls holds in both A Theory of Justice and Political Liberalism, free and equal persons. Or that our inalienable inviolability flows from our moral capacity to form and act on rational life plans. Neither our natural freedom and equality nor our capacity to form, choose, and act on rational life plans rules out that conquest and dominion over others represents the best use of our freedom.
When all is said and done, the mature Rawls’s epic intellectual labors do not illuminate this fundamental perplexity. Indeed, those labors obscure the perplexity, even as the difficulties are diminished — though they are far from overcome — by the young Rawls’s theological doctrine. Inasmuch as it conceives of man as in but not entirely of the natural world, and possessing a spiritual dimension or soul for which he is not responsible but which is of ultimate worth and allows him to transcend determination by nature, the young Rawls’s doctrine fortifies a liberalism whose guiding thought is that of an inalienable inviolability possessed by all individuals.
Such considerations provide more than ample reason for scholars to vigorously open or reopen the question of Rawlsian liberalism’s — and the larger liberal tradition’s — religious roots.