title: Constraints on natural altruism.
abstract: This article is a commentary on 'The roots of human altruism' (Warneken & Tomasello, 2009).
authors.affiliation: Yale University, New Haven, Connecticut, USA. karen.wynn@yale.edu
authors.forename: Karen
authors.initials: K
authors.lastname: Wynn
mesh_terms: D000223:Adaptation, Psychological / Q000502:physiology; D000367:Age Factors; D000375:Aging / Q000523:psychology; D000533:Altruism; D005075:Biological Evolution; D002652:Child Behavior / Q000502:physiology / Q000523:psychology; D002675:Child, Preschool; D003299:Cooperative Behavior; D004645:Empathy; D006379:Helping Behavior; D006801:Humans; D007223:Infant; D007398:Interpersonal Relations; D008960:Models, Psychological; D009042:Motivation; D012641:Selection, Genetic; D012919:Social Behavior; D011795:Surveys and Questionnaires