Robert Trivers Evolutionary biology, Animal behavior, Sociobiology dead at age 83
an American evolutionary biologist and sociobiologist, died on March 12, 2026, at age 83. He was known for proposing the theories of reciprocal altruism, parental investment, facultative sex ratio determination, and parent–offspring conflict. Trivers also contributed to evolutionary explanations of… · 12 March 2026 · March 2026