C. Gregg Singer, Ph.D., A Theological Interpretation of American History, Revised Edition. I knew Dr. Singer as a friend, and he was one of the most underrated scholars in the USA. He was a tremendous Christian and historian, as well as a biblical scholar. This is one of the best books I’ve ever read on the rise and decline of the USA. By all means, get this one! He went home to be with Christ about 15 years ago.