Swiss dialectical theologian. From 1922 to 1953 he taught mainly at Zurich. He supported K. Barth in opposing theological liberalism, but he was sharply divided from him by the influence of M. Buber and by his acceptance of the concept of natural theology, by which a limited knowledge of God may be gained from creation. This, though it did not, like revelation, provide a personal meeting, was a necessary condition of Christian thought. His works include Der Mittler (1927; Eng. tr., The Mediator, 1934) and Das Gebot und die Ordnungen (1932; Eng. tr., The Divine Imperative, 1937).