A theology that stoked much theological creativity in the first half of the twentieth century both in Europe and in the United States had receded by the latter half of the century. One in Christ explores the theology of the mystical body of Christ as developed by Virgil Michel, OSB, examines the reasons for its decline, and traces it throughout the work of Louis-Marie Chauvet, a surprising custodian of the mystical body’s “French stream.” By delineating three major streams of mystical body theology, Timothy R. Gabrielli helps readers understand it more clearly and, in so doing, lays the groundwork for harvesting its potential for contemporary theology.