Canceling the Apocalypse pt. 2 (The Great Depression-the start of WW2/ The 1930's Socialist Impact on the Church in the United States)

Karl Barth's The Word of God and Man
H. Richard Niebuhr's The Social Sources of Denominationalism 
Reinhold Niebuhr's Moral Man and Immoral Society  also The Nature and Destiny of Man
Paul Tillich's Systematic Theology