I read both posts. I'm not buying the conspiracy theory that monogamy is a psychological operation to lure men into a sense of duty and to accept responsibilities. However, if it is true, then the writer builds a strong case against polygamy or polyamory. The writer indicates that rulers of ancient civilizations struggled with apathetic hedonistic polygamous or polyamarous men.

Indeed, making men willing to work hard to provide for their family has been pretty awesome psyop. I really can't see any downsides if civilized society is the ultimate goal. I can just imagine how it feels when the ruler has a big harem and you don't really have a realistic chance for creating a family, but I don't think it makes you work harder once you realize it.