TY  - GEN
AU  - Wynn,Karen
TI  - Constraints on natural altruism
SN  - 0007-1269
PY  - 2009///0821
KW  - Adaptation, Psychological
KW  - physiology
KW  - Age Factors
KW  - Aging
KW  - psychology
KW  - Altruism
KW  - Biological Evolution
KW  - Child Behavior
KW  - Child, Preschool
KW  - Cooperative Behavior
KW  - Empathy
KW  - Helping Behavior
KW  - Humans
KW  - Infant
KW  - Interpersonal Relations
KW  - Models, Psychological
KW  - Motivation
KW  - Selection, Genetic
KW  - Social Behavior
KW  - Surveys and Questionnaires
N1  - Publication Type: Comment; Journal Article
UR  - https://doi.org/10.1348/000712609X441312
ER  -