Feminism - Another one of the great inventions since sliced bread.
Overnight (what's a generation or two at the history's scale, anyway?!) they had twice as many slaves just by suckering half of the active population into wanting something they never really needed before or since.
First thing that should be obvious: twice as many taxes to collect.
The next generation is taken care of by the system 'cause the welfare dependent crowds have little to no time to raise their own children and teach them what could actually be useful going forward.
The dumber they are, the better.
The more the merrier.
Blessed be the meak.
Less persuation needed to be applied.
And so on.

You understand this subject 100%.