"... egalitarianism may even have been one of the important factors that distinguished our ancestors from our primate cousins. “Chimpanzees live in quite aggressive, male-dominated societies with clear hierarchies,” he said. “As a result, they just don’t see enough adults in their lifetime for technologies to be sustained.”

The findings appear to be supported by qualitative observations of the hunter-gatherer groups in the study. In the Philippines population, women are involved in hunting and honey collecting and while there is still a division of labour, overall men and women contribute a similar number of calories to the camp. In both groups, monogamy is the norm and men are active in childcare."

https://www.theguardian.com/science/2015/may/14/early-men-women-equal-scientists

There are all sorts of competing theories and data about the nature of primitive societies.  What's wild is that you think you know how we evolved when those who study human evolution don't.