The answer is a) abolitionism
It was inhumane to americans, especially since the laws here say you can't drink alcohol at 18, but you can die in war at 18.
It was inhumane to Vietnamese, who to this day are still suffering the consequences of the war.
This what i found hope this helped. if not let me know
Hippocrates studied the causes of illnesses.
Socrates invented a teaching method that involved asking questions.
Eratosthenes determined that the Earth was round.
Aristotle educated Alexander the Great.