title: Kinds of kindness: classifying the causes of altruism and cooperation.
authors.affiliation: ENS-UPMC-CNRS UMR, Fonctionnement et Evolution des Systèmes Ecologiques, 7 quai St. Bernard, 75252 Paris Cedex 05, France. minus.van.baalen@ens.fr
authors.forename: M
authors.initials: M
authors.lastname: van Baalen
authors.forename: V A A
authors.initials: VA
authors.lastname: Jansen
mesh_terms: D000533:Altruism; D000818:Animals; D001522:Behavior, Animal / Q000145:classification*; D005075:Biological Evolution; D003299:Cooperative Behavior; D005716:Game Theory; D006801:Humans; D008954:Models, Biological; D012641:Selection, Genetic