Dwyer weaves together elite and subaltern history and highlights the intricate relationship between domestic and international affairs. Through detailed studies of land redistribution in Baja California and Sonora, he demonstrates that peasant agency influenced the local application of Cárdenas’s agrarian reform program, his regional state-building projects, and his relations with the United States. Dwyer draws on a broad array of official, popular, and corporate sources to illuminate the motives of those who contributed to the agrarian dispute, including landless fieldworkers, indigenous groups, small landowners, multinational corporations, labor leaders, state-level officials, federal policymakers, and diplomats. Taking all of them into account, Dwyer explores the circumstances that spurred agrarista mobilization, the rationale behind Cárdenas’s rural policies, the Roosevelt administration’s reaction to the loss of American-owned land, and the diplomatic tactics employed by Mexican officials to resolve the international conflict.