Lesslie Newbigin was a figure of patristic proportions in the twentieth-century history of the Church. In this intellectual and spiritual biography Geoffrey Wainwright displays the theological character of his subject's multifarious engagement in the search for Christian unity, the practice of evangelism and the strategy of mission, the compassionate service of society, and the responsible statement of the scriptural and traditional faith amid the complexities of late modern culture. Himself a distinguished ecumenist and theologian, Geoffrey Wainwright draws on thirty-five years of personal and literary acquaintance with his subject and on a thorough examination of the Newbigin archives in crafting this rich and varied portrait of an outstanding figure in the ecumenical movement.