Earlier quoted context omitted.
Facts are used as evidence, which he what he did. There's nothing wrong with that. If you have a better explanation then let's hear it but all you said was that you believe it's "probably socialized" based on what exactly? This article explains in great detail how that is not the case in any significance and there are even examples where men and women have been socialized oppositely and still end up choosing typical…
Just because you provide sources doesn't mean your sources are relevant to your argument or good sources. Go look at his memo. It is paragraph after paragraph with his beliefs on the matter and then a link to some source which you are supposed to check out. He often doesn't bother explaining how those sources are relevant. That's why it is bad. Just because you've got sources doesn't mean you are saying anything usef…
No society has lasted tens of thousands of years and many were in complete isolation which already says something about how the same roles formed again and again. Also we see the same thing in animals.