Arthur Jensen's 1969 article and the backlash that reshaped the field

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The XYY chromosome defense of the 1960s and why it collapsed The heritability of IQ: what a figure near 0.7 does not mean Polygenic scores for educational attainment: should schools ever be allowed to use them? The Kallikak family study was retouched photographs and invented genealogy Galton coined the word eugenics before anyone knew what a gene was The Bell Curve's race and IQ chapter: what the data could and could not support The DRD4 novelty seeking story and why the warrior gene claim collapsed Do genes determine behavior or only set a range? Gene-environment correlation: passive evocative and active paths from genes to environments Twin studies of personality: the big five heritability numbers and what they leave out