This collection features five essays from noted theologians, philosophers, geneticists, and biologists who discuss the sweeping impact of Charles Darwin's On the Origin of Species on their respective fields. This volume, edited by Ralph Buchsbaum, professor of biology at the University of Pittsburgh, was published to celebrate the centenary of Darwin's announcement in 1858, along with Alfred Russel Wallace, of their independent discovery of the process of natural selection. Darwin's book was published one year later.