Recent writing in social theory has seen a renewed preoccupation with questions of religion, secularization and civilizational difference. This article reappraises the work of one early twentieth-century thinker in relation to these issues: the German historical theologian and close colleague of Max Weber, Ernst Troeltsch (1865-1923). The article concentrates particularly on Troeltsch’s late writings on Europe and ‘Europeanism’. The thesis is defended that Troeltsch offers an important gloss on Weber’s famous assertion of the ‘universal significance and validity’ of occidental rationalism. (...) Troeltsch offers a thicker, more concretized reading of Weber’s statement that serves as a precursor to contemporary thinking about ‘multiple modernities’ and also as a fund of trenchant counter-responses to the claims of recent post-colonial critics about Eurocentrism in western social science. Troeltsch’s writings give us one example among many of a current of cosmopolitan reflexivity in European social thought between the wars that avoided both nationalism and chauvinism, on the one hand, and nihilism and obscurantism, on the other. (shrink)