20 years ago, I was talking with a co-worker, the HR director in the company I used to work in back then. Her background was a PhD in horse breeding. We talked

20 years ago, I was talking with a co-worker, the HR director in the company I used to work in back then. Her background was a PhD in horse breeding. We talked about topics such as this. She said, based on her background with horses and by watching which of her friends had the most kids, she was not very optimistic about future generations. From the stats, it looks like it is only the rich (7 digits) and the very poorest that currently have fertility above the replacement rate: https://twitter.com/CSchmert/status/993934031174725632/photo/1 https://twitter.com/CSchmert/status/993934031174725632/photo... How much that affects the genes, is hard to say, apart from what the horse-breeder's gut feeling was.