An examination of Rushton's theory of differences in penis length and circumference and r K life history theory in 113 populations
Rushton's (1985, 2000) r K life history theory that Mongoloids are the most K evolved, Caucasoids somewhat less K evolved, and Negroids the least K evolved is examined and extended in an analysis of data for erect penis length and circumference in three new data sets. These new data extend Rushton's theory by presenting disaggregated data for penis size for European and North African/South Asian Caucasoids; for East Asian and Southeast Asian Mongoloids; for Inuit and Amerindians and Mestizos, and for thirteen mixed race samples. The results generally confirm and extend Rushton's r K life history theory.