Curtis Johnson is Robert B. Pamplin Jr. Chair of Government Emeritus at Lewis & Clark College in Portland, Oregon. His areas of expertise include the history of political thought, with emphasis on ancient political theory, and Darwin in the context of 19th century biological theory. He has published books and articles on the political thought of Aristotle and Plato and recently on Darwin's thought (Darwin's Dice, 2014). He was drawn to Darwin studies from a long-standing interest in Aristotle's biological works.