Race, Evolution, and Behavior: A Life History Perspective
"Rushton's thesis is that when fully modern humans migrated out of Africa, perhaps only 100,000 years ago, the colder Eurasian climate selected for larger brains, more forward planning, greater family stability, and increased longevity with concomitant reductions in sex hormone, speed of maturation, reproductive potency, and aggressiveness. Rushton's theory emphasizes a trade-off between parenting and mating and brings into focus the concept of a coordinated life history of characteristics, evolving together, to replicate genes more effectively. The selection for large brains and parenting skills was taken furthest in east Asia. Rushton's theory explains differentiation in intelligence and predicts other, seemingly unrelated race effects, such as differences in frequency of twinning. The capacity to unify disparate phenomena is usually considered a virtue in theories. Rushton's gene-based evolutionary models explain ethnocentrism and racial group differences, and may provide a catalyst for understanding individual differences and human nature. Chapters in Race, Evolution, and Behavior include "Character Traits"; "Behavioral Genetics"; "Race and Racism in History"; "Race, Brain Size, and Intelligence"; and "Sexual Potency, Hormones, and AIDS."".
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adopted adult African African Americans aggregated aggression altruism American Amerindians Asians assortative mating average Behavior Genetics biological birth black-white differences Caucasian Caucasoids cognitive correlation cranial capacity crime cultural dizygotic E. O. Wilson effects environment environmental erectus estimates ethnic European evolution evolutionary example Eysenck factors female Figure Galton genes genetic influence genetic similarity groups heritability higher hominid Homo Homo erectus human inbreeding depression increased infants intelligence intercourse Intermediate Earlier Jensen less lower Lynn males mating maturation mean IQ measures mental ability Mongoloids Neanderthals Negroids offspring organization Orientals parents personality populations predicted primates Psychological r-selected race differences racial differences reported Reprinted with permission reproductive strategies Rushton sample scale Scarr scores selection sexual behavior siblings skull social class sociobiology species studies suggested Table testosterone tests theory tion traits twin studies twins reared United variables variance Wilson women