There was a video on youtube a couple of years ago. A lady whom is a historian, went through history books, old diaries, old scrolls and other stuff. Investigating why such empires collapsed. And the same thing come up everytime. When the males start to become like woman, the empire collapses. A study was also done with rats. They gave the rats everything, At the beginning they were normal rats, but once they got to about 30th generation the male rats spent more time making themselves beautiful and not fighting. They also found a reduction in breading.
Just look at the comparisons with the United States and The Roman Empire. I suggest have a watch of Stefan Molyneux on the comparison.
That's really interesting and thank you for the link, I will check it out tonight.