This chapter examines the conditions that fostered liberation theology in Latin America. The chapter provides a brief overview of liberation theology’s central themes and how it fueled revolutionary movements in Central America, particularly in Nicaragua, El Salvador, and Guatemala. It surveys the Catholic hierarchy’s responses, ranging from sympathy to condemnation, and highlights several US religious movements that expressed solidarity with Central American Catholics who were fighting for social justice. These organizations included Witness for Peace, which brought US Christians to the war zones of Nicaragua to deter combat attacks, and also Pledge of Resistance, which mobilized tens of thousands into action when US policy toward the region grew more bellicose. Finally, the chapter describes the School of the Americas Watch, which aimed to stop US training of Latin American militaries that were responsible for human rights atrocities.