A multi-disciplinary panel of evolutionary biologists, joined by a philosopher and an artist, discuss how and why we order and describe the natural world the way that we do now and possible alternatives. The featured speakers from Yale are Michael Donoghue, the G. Evelyn Hutchinson Professor of Ecology and Evolutionary Biology; Jacques Gauthier, professor of geology and geophysics and curator of vertebrate paleontology and vertebrate zoology at the Peabody Museum; Richard Prum, the William Robertson Coe Professor of Ornithology, Ecology and Evolutionary Biology; and Zoltan Szabo, professor of philosophy. Also taking part in the discussion are Kevin de Queiroz, curator and research zoologist at the Smithsonian Institution’s National Museum of Natural History, and artist, writer and naturalist James Prosek.