"Evolution, it should be remembered, predates gender by a long time." 1. Good point - gender is 50 years old (first used in 1963). 2. What about other, non-hu

"Evolution, it should be remembered, predates gender by a long time." 1. Good point - gender is 50 years old (first used in 1963). 2. What about other, non-human organisms? If we leave humans out of it, there have to be significant differences in brains between sexes of different species.