One person or group has the power and believes they can own another person.
Economic reasons.
They were people who were against slavery for various reasons.
Why are some people against slavery give some reasons and explain
Normally for economic reasons
cotton
Slaves were simply cheap labour
Slavery, Political, and Democracy.
Banned slavery.
slavery in the Americas started when the Europeans came over and they started to enslave the native people
to reorganize the union and to stop slavery from spreading but later on it was to abolish slavery completely.
They Fought because of slavery. The South Wanted Slavery and The North didn't.
Any civilization whose peoples are taken or forced in to slavery for political, sexual or labour reasons