This article examines how Luís Valdez uses prosocial racial humor in his collection of short plays to challenge the anti-Mexican racism directed against the strikers during the 1965–1970 Delano, California, grape strike as well as to address many of the other social issues faced by the Chicano community during this period. Drawing on social psychology research on the dynamics of racial group identification and focusing on the acto entitled Los Vendidos, the article analyzes how Valdez and his Teatro Campesino created the set of conditions that allowed audience members to confront and overcome the negative effects of the racial stereotyping and ethnic slurs they were experiencing on the picket lines and elsewhere and in the process to raise their Chicano cultural and political consciousness.