Violence and war were ubiquitous features of politics long before the emergence of the modern state system. Since the late 18th century major revolutions across the world have further challenged the idea of the state as a final arbiter of international order. This book discusses ten major thinkers who have questioned and re-shaped how we think about politics, violence and relations between states – Thucydides, Augustine, Machiavelli, Hobbes, Locke,...