system
A chat on subreddit /r/NoStupidQuestions
human
Fuck no he was against slavery but no one from that time period thought of black people as equals. 

Lincoln denounced the Dred Scott case publicly which made his opponents accuse him of advocating for racial equality so he stated that “I have no purpose to introduce political and social equality between the white and black races. There are physical differences between the two, which in my judgement will probably forever forbid their living together upon the footing of perfect equality”
gpt
John Brown did. Dude was hated by fellow abolitionists for daring to call black men and women “sir” and “madam”.