In the 1930s and 1940s, rural reformers in the United States and Mexico waged unprecedented campaigns to remake their countrysides in the name of agrarian justice and agricultural productivity. Agrarian Crossings tells the story of how these campaigns were conducted in dialogue with one another as reformers in each nation came to exchange models, plans, and strategies with their equivalents across the border. Dismantling the artificial boundaries that can divide American and Latin American history, the book shows how the agrarian histories of both regions share far more than we realize.