[_liww]

This study (https://www.pnas.org/content/114/5/E727) measured the speed at which selection against cognitive ability is occuring in the Icelandic population (they measured this genotypically rather than phenotypically). The rate at which it occurs is meaningful on the scale of our lifespans. Same is probably true for fertility rates, but as fertility is being selected for directly (rather than the indirect effect on cognitive ability) it's probably even more rapid.

Then this study more directly measured fertility's rate of evolution: https://www.pnas.org/content/115/1/151. They used UK Biobank data (genetic data from 157,807 female and 115,902 male unrelated samples). They found the 'Age at First Birth' is the most strongly selected trait in the British population. So in the future we can look forward to a world filled with teenage mums.

That this is not obvious to everyone is just a testiment to how little people understand about evolution.

[j_wtf_all_taken]

> That this is not obvious to everyone is just a testiment to how little people understand about evolution.

Exactly because things are not obvious, they need to be explained. As long as you do not explain the things you call obvious, you cannot judge if people do not understand a topic.