Erik Wingrove-Haugland / Plato / Artistotle / John Stuart Mill / G.E. Moore / Richard B. Brandt / Bernard E. Rollin / Gary Imhofff / Julian Simon / J. Baird Callicott / Immanuel Kant / Onora O'Neill / Anthony E. Hartle / Paul Taylor / John Rawls / Carl Cohen / Robert L. Simon / Karen Warren / Lois Pineau / Stephanie Gutmann / Ken Corbett / Richard A. Wasserstrom / Manual Davenport / Katherine T. Bartlett / Jean F. O'Barr / Garrett James Hardin / Igor Primoratz / Stephen Nathanson / Judith Jarvis Thomson / James Rachels / J. Gay-Williams | 