system
A chat on subreddit /r/NoStupidQuestions
human
This is the correct answer, its current usage is an insult, basically referring to a "social justice warrior". 

Whatever the origin of the word historically, this is its current meaning. It's like the semantic shift of "internet troll" from someone baiting a response from another user online (normally with obfuscating stupidity)to just "bad person". 


*Edit to remove the word "definitely"
gpt
It originated in the 1920’s in part of the Civil Rights movement.