Matriarchies don't work because of simple natural selection. Natural selection picks the civilizations whose women do absolutely nothing but pop out babies 24/7 as the ones to produce the next generation of humans. Virtually any social movement that was against reproduction ironically was wiped out within a few generations.

@cable_extreme said:
@superadam: how are matriarchies agaisnt reproduction?

It takes a woman nine months to have a child. It takes a man five minutes to a couple hours. Because of this difference, women have to dedicate themselves to doing nothing but reproduction for a society to flourish, reproductively. Whereas men do not.

@cable_extreme said:
@superadam: for the 9 months out of thier lives that they are pregnant

Someone has to raise the child to adulthood, and that can take like 14-18 years. Its virtually impossible to raise a child and support yourself and the child, at the same time. That's why most single mothers are on welfare and collect child support. Its also very difficult to support yourself while your going through a pregnancy. Patriarchy simply makes the most sense reproductively.