States with weak institutions can lose from trade with strong states when trade is subject to predation. The happy liberal idea of trade fostering better institutions and peace can be turned on its head. The Ricardian model of trade subject to predation offered here implies imperialism without capital, contra Marxists. Weak and poor South trades with strong and rich North. Poor South labor is attracted to predation. Labor market effects of predation and enforcement amplify opposing interests in the terms of trade, potentially obviating the standard gains from trade that allows bargaining solutions to surplus division.