Differential K theory
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In psychology and criminology, Differential K theory is a debunked hypothesis first proposed by Canadian psychologist J. Philippe Rushton in 1985,[1] which attempts to apply r/K selection theory to human races.[2] According to Rushton, this theory explains race differences in fertility, IQ, criminality, and sexual anatomy and behavior.[3] The theory also hypothesizes that a single factor, the "K factor", affects multiple population statistics Rushton referred to as "life-history traits".[4] It has been criticized as a key example of scientific racism and devoid of empirical basis.[5][6]