“There are two distinct threads in the history of American secularism—the first descending from the humanism and egalitarianism of Paine and the second from nineteenth-century social Darwinism through the twentieth-century every-man-for-himself “objectivism” of Ayn Rand. A true intellectual descendant of Paine, Ingersoll linked reason and science to the success and survival of democracy, as the Enlightenment deists among the founders did, and contended that the capacity for rational thought existed among all races and social classes.”