Notable Quotables (one in a series)

A further consequence of modern optimism is a philosophy of history expressed in the idea of progress. Either by a force immanent in nature itself, or by the gradual extension of rationality, or by the elimination of specific sources of evil, such as priesthoods, tyrannical government and class divisions in society, modern man [sic] expects to move toward some kind of perfect society. The idea of progress is compounded of many elements. It is particularly important to consider one element of which modern culture is itself completely oblivious. The idea of progress is possible only upon the ground of a Christian culture. It is a secularized version of Biblical apocalypse and of the Hebraic sense of a meaningful history, in contrast to the meaningless history of the Greeks. But since the Christian doctrine of the sinfulness of man [sic] is eliminated, a complicating factor in the Christian philosophy is removed and the way is open for simple interpretations of history, which relate historical process as closely as possible to biological process and which fail to do justice either to the unique freedom of man or to the daemonic misuse which he may make of that freedom.

Reinhold Niebuhr, The Nature and Destiny of Man: A Christian Intepretation, Vol. I (Louisville, KY: Westminster John Knox Press 1996), p. 24.

I should point out the original publication of these words was 1941.