The Altruistic SpeciesWhat motivates altruism? How essential is the phenomenon of altruism to the human experience? Is altruism readily accessible to the ordinary person? In The Altruistic Species, Andrew Michael Flescher and Daniel L. Worthen explore these questions through the lenses of four disciplinary perspectivesbiology, psychology, philosophy, and religion. In their investigation, they make an extended argument for the existence of altruism against competing