My brother JoJo is working this summer on Jeju Island, South Korea. I read that the island has been historically matriarchal. In large part because of the Haenyo who have been the primary breadwinners. Apparently the men were too skinny and the women better adapted to stay in the water. They are able to dive 20 meters deep and hold their breath for over 2 minutes. Often it was the men who stayed home and raised the family. How cool is that!

photo: source