Slavery has been practiced in different ways since one human found out he could overpower other humans.
All the slavery of Africans came about because OTHER Africans overpowered weaker tribes and sold them to European and English slavers.
The European and English slavers took them to the "New World" to work their sugar, tobacco, rice, and cotton plantations.
Most of the wealth of the UK and the European countries came from the slave plantations wealthy citizens of those countries maintained in the New World.
Once we took over the USA and eliminated slave labor here....the Europeans and the English continued to loot other countries. England, for example, barged into India and set up plantations there....and didn't get kicked out until well into the 1900's.
So...no, Americans did not set up slavery....Europeans and the English did. Cuba, for example, had more slaves than anywhere else...Spanish brought them there.
Lincoln's plan to deal with the freed slaves was to provide passage back to Africa for all of them. I am thinking I read somewhere this was offered after the Civil War....but most preferred to stay here. Freed slaves, I am thinking, were offered land grants, etc. to help them get established.
Everyone needs to get over anything that happened to someone in their family hundreds of years ago. Those alive today were not enslaved, nor is anyone living today someone who has slaves.
Those who think their race or religion is the only one which has ever been persecuted are simply not well educated. Everyone's group has come in for some persecution throughout the centuries. No one is jumping up and down trying to get paid for it.