SummaryThe foundations of modern international thought were constructed out of diverse idioms and disciplines. In his impressive book, Foundations of Modern International Thought, David Armitage focuses on the normative idioms of natural law and political philosophy from the Anglophone world, from Hobbes and Locke to Burke and Bentham. I focus on parallel developments in the empirically-oriented disciplines of history and historiography to trace the emergence of histories of the states-system in the Italian- and German-speaking worlds, from Bruni and Sarpi to (...) Pufendorf and Heeren. Taking seriously Armitage's remark that ‘the pivotal moments in the formation of modern international thought were often points of retrospective reconstruction’, I argue that the historical disciplines supplied another significant intellectual context in which the modern world could be imagined as ‘a world of states’. (shrink)