This fifth and final volume of Veli-Matti Kärkkäinen's ambitious five-volume systematic theology develops a constructive Christian eschatology and ecclesiology in dialogue with the Christian tradition, with contemporary theology in all its global and contextual diversity, and with other major living faiths--Judaism, Islam, Buddhism, and Hinduism. In Part One of the book Kärkkäinen discusses eschatology in the contexts of world faiths and natural sciences, including physical, cosmological, and neuroscientific theories. In Part Two, on ecclesiology, he adopts a deeply ecumenical approach. His proposal for greater Christian unity includes the various dimensions of the church's missional existence and a robust dialogical witness to other faith communities.