Five to 7,000 years ago is when the Asian tribes swept into Europe and began the shift from matralineal to patriarchal societies. This is reflected very strongly in the Old Testament Bible. Early Jewish history had important goddesses as did the Greeks and others. Patriarchal rulers would have multiple wives and concubines, and prevent lesser males from breeding. I saw a National Geographic article some decades ago about digging out a 50 foot high Bulgarian settlement mound. Before 5,000 years ago the pottery was bright and colorful. After that time it was made more precisely, but basically colorless and without joy. Women as slaves making pottery??
You might be onto something. The Hun had a habit of killing all the men and boys. It cut down on all of the “revenge” hormones causing trouble.
It was a lot easier to hold onto territory in the rear when the possibility of revolt was minimized.