If you take two normal distributions, and shift one to the left a bit, and shift one to the right a bit, the peaks are not far from each other. But all of the i

If you take two normal distributions, and shift one to the left a bit, and shift one to the right a bit, the peaks are not far from each other. But all of the inhabitants of each tail end will be almost exclusively from one group. So if males are slightly more competitive, obsessive, aggressive, and stronger on average, we end up with the populations of grandmasters, CEOs, professional sports, and prison populations all 90+ percent male.