In the 1930s and 1940s - amid the crises of totalitarianism, war and a perceived cultural collapse in the democratic West - a high-profile group of mostly Christian intellectuals met to map out 'middle ways' through the 'age of extremes'. Led by the missionary and ecumenist Joseph H. Oldham, the group included prominent writers, thinkers and activists such as T. S. Eliot, John Middleton Murry, Karl Mannheim, John Baillie, Alec Vidler, H. A. Hodges,...