“History looks more and more like a science fiction novel in which mutants repeatedly arose and displaced normal humans ‚Äì sometimes quietly, by surviving starvation and disease better, sometimes as a conquering horde. And we are those mutants.” Humans are evolving, and there’s a difference even over the small time frame of the past 1000-10,000 years. Two big causes are the huge increases population growth, which means more mutant genetic strains, and our geographic spread, which makes for environmental adaptation.