This book examines international trade cooperation in 1815–1914. Basing the theoretical analysis on the domestic political economy of states, Pahre develops theories of international cooperation, the spread of trade cooperation, and the effect of trade regimes. It is the first book to examine trade politics in the entire century from 1815 to 1914 around the world, using a new database of trade agreements. It will appeal to students of international relations, comparative political economy, economic history, trade law, and international organizations.