The Sanctuary Movement began in 1981 as a collection of mostly church-related people deciding to help the wave of Central Americans migrating to the United States, and was transformed in the following years into a highly volatile church-state confrontation. The movement established an underground railroad to help Central Americans enter the US and then provided sanctuary within churches, where the US government was legally forbidden entry. In "God and Caesar at the Rio Grande", Hilary Cunningham offers an account of the history and growth of the Sanctuary Movement in the US, as she demonstrates how religion shapes and is shaped by political culture. Focusing on the Sanctuary located in Tucson, Arizona, Cunningham explores the movement primarily through the experiences of everyday participants, including interviews with Sanctuary workers and reproduction of letters from her stays in Arizona, Mexico, and Guatemala. She discusses and illustrates such diverse subjects as US church-state relations, the social construction of power, and international refugee policy. One of the few books to document the culture of the religious Left in the US, "God and Caesar at the Rio Grande" illustrates how a particular group of people used religious beliefs and practices to interpret and respond to State authority. This book should be of interest to individuals wishing to explore the relationship of religion to power and social change.