This paper aims to initiate francophone readers to the research program of international historical sociology (ihs) and to the theory of uneven and combined development (ucd) as an attempt at a transdisciplinary synthesis between historical sociology and international relations (ir). This attempt will be analyzed through the study of revolutions as a research object representative of the epistemic break between the two disciplines. We will deconstruct the transdisciplinary project of ucd in order to show how it falls short of the initial objectives of ihs in terms of the sociologization and historicization of ir. We will then try to reactivate these objectives and reformulate the interdisciplinary relation between sociology and international relations through a historicist and epistemological reflection on the basis of the theory of social property relations.