Between the early seventeenth and mid-nineteenth centuries, major European political thinkers first began to look outside their national borders and envisage a world of competitive, equal sovereign states inhabiting an international sphere that ultimately encompassed the whole globe. In this insightful and wide-ranging work, David Armitage – one of the world's leading historians of political thought – traces the genesis of this international turn in intellectual history. Foundations of Modern International Thought combines important methodological essays, which consider the genealogy of globalisation and the parallel histories of empires and oceans, with fresh considerations of leading figures such as Hobbes, Locke, Burke and Bentham in the history of international thought. The culmination of more than a decade's reflection and research on these issues, this book restores the often overlooked international dimensions to intellectual history and recovers the intellectual dimensions of international history.