Originally published in 1988, Jon Roberts's book provided the first comprehensive analytical overview of public dialogue among nineteenth-century American Protestant intellectuals who struggled with the theory of organic evolution. Before the publication of Darwin's <i>Origin of Species</i> in 1859, most American Protestant intellectuals valued science, especially natural history, for supplying data that appeared to be invaluable for defending many major tenets of the Christian worldview. Arguments over the scientific merits of Darwin's theory gave way to discussions of its theological implications. Roberts's book reconstructs the course of that conversation from 1875 to 1900.