Well before slavery in America, there was an agreement of some sort where people would come to the new land poor and work for them for at least 7 years, however, America started to think "What if we had PERMANENT slaves which we could treat however we wanted” and then they sailed to Africa where they traded with the African leader for Negros to use.”
It was useful because it was one of the first forms of writing.
The cause was MAIN -imperialism alliances nationalism and militarism
A.
as a result of anti-Japanese prejudice and fear
