This survey, by a pupil of Geoffrey de Ste. Croix and eventual successor in his Oxford job, combines personal recollections of de Ste. Croix’s horizons and intellectual range with a penetrating study of his Origins of the Peloponnesian War, its underlying debts and detailed contentions. It addresses his, and Thucydides’, engagement with origins and causes, his central contention about votes by the Spartans and their allies on whether to go to war, the roles of Corinth, Megara and the much-discussed Megarian (...) decree. It also presents a close reading of an Athenian involvement in Macedon and the north and its relevance to de Ste. Croix’s views on Athenian imperialism. It then sets the book’s conclusions in a wider context, ranging from modern writings on the origins of war to its concluding echo of Lenin. (shrink)