Human Extinction
If it was complete role reversal then we would probably be extinct. Now I know the feminists would be all over this but hear me out. I know that there are some women out there that are plenty capable of running and killing things; however, let us be realistic on the limitations of womanhood in how this would relate back in the beginning of humans when hunting was done with spears. And the animals hunted were for the most part large. Estrogen does not bulk muscle the way testosterone does. The majority of woman body builders can thank testosterone supplements. Additionally, women tend to run slower and have more problems with injury due to the widened hips and proportions of body mass. Not to mention the problem with being pregnant and trying to hunt food or escape predators and rivals as this would now be the woman's job to protect the village and children. Sure the rivals would also be women so that would be a wash but when it came to predators there is a notable disadvantage for a woman. There is a reason the initial roles were as they were. It made evolutionary sense. Sorry ladies. We just would not have cut it as men.