The Community of Believers offers the proceedings of the 2013 Building Bridges seminar, a dialogue between leading Christian and Muslim scholars under the stewardship of Georgetown University. These essays consider such themes as the Church as mystical body of Christ versus the Church as proclamation; the roots and uses of the term ummah and its development over time; Christian desires for communion, experiences of division, and approaches to unity; the history of Muslim disunity; twentieth-century Christian ecclesiology and its responses to a post-Christendom and post-Christian world; and the Arab Spring as a case study for contemplating accommodationism, conservatism, reformism, and fundamentalism as Muslim strategies to address the pressures of modernism. The volume also includes texts and commentaries used in the seminar’s discussions of each topic and a concluding essay summarizing the tone, content, and style of participant exchanges throughout the seminar.