In a dozen specially commissioned essays, the contributors to Species offer a variety of perspectives — not only biological but also philosophical, historical, and anthropological — on the concept (or concepts) of species. Robert N. Brandon hails Species as "a fresh, well-conceived collection on one of the most persistent problems in the philosophy of biology — the species problem." The contributors are John Dupré, David L. Hull, Kevin de Queiroz, David L. Nanney, Kim Sterelny, Richard Boyd, Robert A. Wilson, Paul E. Griffiths, Scott Atran, Frank C. Keil and Daniel C. Richardson, Marc Ereshefsky, and Brent D. Mishler.