Alejandro Rosas is associate professor in the philosophy department at the Universidad Nacional de Colombia. Trained initially as a Kant scholar, he later turned to pursue a naturalistic worldview. His current project is to develop a picture of the evolutionary genesis of a moral agent. This involves work on moral psychology and moral theory, experimental economics, multilevel selection theory, the evolutionary theory of cooperation, and the evolution and phylogeny of typical human cognitive and behavioral traits. Recent publications include “The sociobiological dilemma“ (Zygon 2007), “Multilevel selection and human altruism“ (Biology and Philosophy 2008) and “The return of reciprocity“ (Biology and Philosophy 2008).