‘Temporalization’ and political modernity : Thinking with Koselleck The notion of ‘temporalization’ is one of the key concepts in the Koselleckian Begriffsgeschichte. It refers to the general issue of human temporality and more specifically to the epistemological problem of historical temporalities. In Koselleck’s writings, it constitutes a fundamental interpretative framework for political modernity as a whole. This article returns to these different issues and reconstructs their common background : an implicit ‘general theory of historical experience’. There then follows a general survey of the analytical uses of the notion of ‘temporalization’ as understood by Koselleck himself. As a result, the key concept of ‘temporalization’ emerges as a global process within political modernity as a whole working in interaction with other global processes. Henceforth, these should be identified and typologized precisely, in continuity with Koselleck’s notion of course, but also prospecting further and moving beyond his initial framework. The present article aims at distinguishing and also combining, on an ad hoc basis, the different levels of analysis at work in the historicization of modern political languages. In so doing, it reengages the dialogue between both history (structural, cultural and political historical studies) and political science ; it ascribes a particular causality status to modern religious and political ideas, to modern political philosophy and theories of law and to the inertia of historical semantics in the long term. These are all different types of historical factors which are too often underestimated, due to an excessively narrow working definition of what historical experience is.