Answer:
Explained below
Step-by-step explanation:
Slavery was an ill practice prevalent in different parts of the world. The prejudice against black African Americans due to their race and culture. It was first rooted out from United States after the outbreak of Civil war for the liberation of black lives. Their long battle helped to get rid of slavery.
There are several justifications for slavery in America:
1) Ethnocentrism
2) White man's burden
3) Civilization of the savage race
4) Us vs Them
Against Slavery:
1) Democracy
2) Equality of man
3) Christ's teaching of brotherhood