In this book eight major European theologians explore these questions in depth, analyzing them from the standpoints of the Christian's understanding of the world, his experience of Christ in the world, and his own life in the world. Alfons Auer presents a historical and philosophical perspective of the changing character of the Christian understanding of the world. Karl Rahner examines the relationship between world history and salvation history, devoting special attention to the meaning of revelation to the Christian. Father Rahner also examines the role pf Christianity in the life of the 'new man' of the future, confronted by the implications of the scientific and technological change.