You saw the chart on the side about how autosomal dominance works? Two parents, one of which has the trait, will churn out kids, half of which have the trait. So if 2% have it now, unless this confers a substantial benefit in the survival and reproductive success, that percentage will likely stay the same for generations to come.
Also, the Notable People on your wikipedia link includes Donald Trump, who notably, does not have a lower body mass index than average. But his short sleep schedule is potentially less natural than chemical.
davidfry t1_jc0rddf wrote
Reply to Seems to me evolution found a solution to human obesity problem (Familial natural short sleep). Do you agree with my reasoning? by alex20_202020
You saw the chart on the side about how autosomal dominance works? Two parents, one of which has the trait, will churn out kids, half of which have the trait. So if 2% have it now, unless this confers a substantial benefit in the survival and reproductive success, that percentage will likely stay the same for generations to come.
Also, the Notable People on your wikipedia link includes Donald Trump, who notably, does not have a lower body mass index than average. But his short sleep schedule is potentially less natural than chemical.