Differential K theory

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