title: Primer: altruism.
authors.affiliation: Math Inst. University of Vienna and Institute for Applied Systems Analysis, Laxenburg, Austria.
authors.forename: Karl
authors.initials: K
authors.lastname: Sigmund
authors.forename: Christoph
authors.initials: C
authors.lastname: Hauert
mesh_terms: D000533:Altruism; D000818:Animals; D001000:Ants / Q000469:parasitology; D005075:Biological Evolution; D001717:Birds / Q000469:parasitology; D002417:Cattle; D003299:Cooperative Behavior; D004013:Dicrocoelium / Q000502:physiology; D006790:Host-Parasite Interactions; D006801:Humans; D012098:Reproduction / Q000502:physiology; D012641:Selection, Genetic