Yes, but they also have higher T >After these adjustments were made, blacks had a 15% higher testosterone level and a 13% higher free testosterone level. https://pubmed.ncbi.nlm.nih.gov/3455741/ Another study found that: >The study concluded that in young black men, testosterone levels are highest – but once belly fat levels are factored in this differences disappears. >Racial data shows no differences in androgens between black and white older men That said, it doesn't look like the difference is significant enough to result in the aggression difference, which may be better explained with your point.