John Zizioulas is widely recognised as the most significant Orthodox theologian of the last half century and acclaimed advocate of ecumenism. From his indepth knowledge of the intellectual resources of the Church, Zizioulas has argued that the Church Fathers represent a profound account of freedom and community that represents a radical challenge to modern accounts of the person. Zizioulas uses the work of the Fathers to make an important distinction between the person, who is defined by a community, and the individual who defines himself in isolation from others, and who sees community as a threat to his freedom. Zizioulas argues that God is the origin of freedom and community, and that the Christian Church is the place in which the person and freedom come into being. This volume offers a critical appraisal of the theology of John Zizioulas. Leading Anglican, Reformed, Catholic and Orthodox international scholars, including Colin Gunton, Nicholas Loudovikos, Paul McPartlan, Wolfhart Pannenberg and Philip Rosato present essays which analyse Zizioulas' trinitarian doctrine of God, and his theological account of the Church as the place in which freedom and communion are actualised. Many include discussions of Zizioulas' Being as Communion as well as other lesser known works, now available in Communion and Otherness. Together they represent an unrivalled introduction to the work of this great theologian.