Book excerpt: The Lost Soul of American Politics is a provocative new interpretation of American political thought from the Founding Fathers to the Neo-Conservatives. Reassessing the motives and intentions of such great political thinkers as Madison, Thoreau, Lincoln, and Emerson, John P. Diggins shows how these men struggled to create an alliance between the politics of self-interest and a religious sense of moral responsibility—a tension that still troubles us today.