This unique collection presents texts in international relations that range from Ancient Greece to the First World War. It is the largest anthology currently available and includes extracts from works by fifty thinkers, including Thucydides, Augustine, Aquinas, Machiavelli, and John Stuart Mill. The texts are organized into broadly chronological sections, each headed by an introduction placing the work in its historical and philosophical context. Ideal for students and scholars, the volume also includes biographies and guides to further reading.