"Michael Ruse is a Canadian philosopher of science with a sharp but good-natured wit, and an inclination to pursue controversial topics related to evolution...[In this book] Ruse is at his scholarly best, exploring thoughtfully the role of ideological and epistemic values in evolutionary science." - Phillip Johnson, Washington Times "Because evolutionary theory has been one of the chief battlefields in the war between constructivists and positivists, Ruse could not have picked a more appropriate topic of study...The readers of Ruse's spirited and ambitious book get to enjoy one more salvo in the science wars." - David L. Hull, Science"