system
A chat on subreddit /r/PoliticalCompassMemes
human
By total coincidence, they also started the anti-pornography movement

These were the inheritors of the same brand of feminists who championed alcohol prohibition (going so far as to attack people and burn down pubs)
gpt
Those were first wave I thought.   

1st wave - suffrage through prohibition - actively railed against abortion as it was a way for men to hide their affairs.

2nd wave - WWII to 1980s - focused on women entering the workforce then equal pay

3rd wave - what we see today - neomarxist identarian stuff.