Both patriarchy and monogamy are only 10K years old, 3% of human history.
You really ought to do some research before writing stuff like this.
Although it’s widely assumed that who we are at our core today is derived from those kinds of cultural conditions, they have only existed for the past 10,000 years -a drop in the bucket of human history. And far from being a paleolithic paradigm, it’s one from a very recent societal model — patriarchy. For 97% of our human past, we lived a much more cooperative existence in which women had social equality and a fair amount of sexual freedom. Males and females may have had distinct roles, but they shared power and decision-making. (1) It’s likely that there was some type of pair-bonding although it probably was quite different in many fundamental ways from later concepts of marriage that developed under a more hierarchical system.
“The great anthropologist and comparativist Sarah Hrdy tells us that, across species, including among humans, the best mother for many eons was the one who was, under particular and far-from-rare ecological circumstances, promiscuous. By being so, she could hedge against male infertility, up her odds of a healthy pregnancy and robust offspring, and create a wider network of support by lining up two or three males who figured the offspring might be theirs.”