> ...because there's a plausible and uncontested rationale, unlike skin color? Men generally have more testosterone, which leads to aggression and worse impulse

> ...because there's a plausible and uncontested rationale, unlike skin color? Men generally have more testosterone, which leads to aggression and worse impulse control. Why isn't it plausible that different groups are different in some ways? For instance, when it comes to testosterone, this seems to be the science. https://www.ncbi.nlm.nih.gov/books/NBK20759/ https://www.ncbi.nlm.nih.gov/books/NBK20759/ > In fact, African American men have higher exposure to testosterone, the main biologically potent circulating androgen, than their Caucasian and Asian counterparts, beginning in the in utero period. African American women have testosterone levels that exceed those of Caucasian women by 50% or more in early pregnancy, an exposure that has been hypothesized to permanently alter the “gonadostat,” the hypothalamic-pituitary-testicular axis, in African American male offspring relative to Caucasians. African American men during young adulthood also have substantially higher circulating testosterone levels than their Caucasian counterparts (approximately 13 to 15% difference at age 20 years). Although this difference appears to dissipate with age, African American men still have slightly higher testosterone levels than Caucasians (≈3% higher) at age 40 years.