Abstract
Darwin begins On the Origin of Species by asking the reader to “reflect on the vast diversity of the plants and animals which have been cultivated” (1859, p. 7); almost five-hundred pages later, he closes by having the reader consider the “endless forms most beautiful and wonderful” that have evolved (1859, p. 490). Darwin contemplates diversity throughout the Origin and presents the principle of divergence as a way to explain it. Darwin formulated the principle of divergence around 1857 (Browne 1980), at which point he began replacing his previous view of “limited perfect adaptedness” with a view of relative adaptedness (Ospovat 1981; Burian 1983). Proponents of perfect adaptedness, such as Paley and ..