Columbia subject headings:
Harvard subject headings:
Altruistic behavior in animals.
Behavior evolution.
Cognitive neuroscience.
Conscience
Ethics, Evolutionary.
Human evolution.
Neuropsychology
Primates--Behavior
Princeton subject headings:
Altruistic behavior in animals.
Behavior evolution.
Cognitive neuroscience.
Conscience.
Ethics, Evolutionary.
Human evolution.
Neuropsychology.
Primates--Behavior.