Sadly, no one. But the US Congress outlawed the Atlantic slave trade in 1808, following Britain's law of 1807. Results were rather horrible: Fairly northern states in the South (Virginia, Kentucky) found they could "breed" and sell people for higher prices to the Deep South, which they did (according to VA. newspapers of the 1800s). And after passage of the Fugitive Slave Law of 1850, which allowed US Southerners to chase their "escaped slaves" into the North, "negro catchers" appeared on the scene. They would hang around small towns in the North, spot a strong Negro man, send a telegram South asking for a "writ" to capture him as an escaped slave, and kidnap him! Negro sailors and riverboat workers were kidnapped and sold, and one man escaped being drugged and put in a "negro pen" in Washington, DC, with help from Salmon Chase, a US Senator who would soon become the abolitionist governor of Ohio. (You can search the old New York Times and find these stories; if you're writing a paper, you'll get great info.)
But the slave trade existed long before Europe and the US got into African slavery, and it continues to exist today, even in the US.
Okay, off the soapbox!
Abraham Lincoln our 16th president ended slavery after the civil war.
The "reason" why they stopped it was because it was believed to be wrong and immoral some would say that the north would have done the same thing if they needed cheap labor but they didn't because they had factoryies and not plantations
this is not my question
No one
No he stopped slavery in the USA.
They stopped slavery.
It stopped
abolitionists
Abolitionists
he stopped slavery
he did it on September 22,1862
william wiberforce
yes, they did oppose.
Abraham Lincoln
aberaham Lincoln
I believe that the name of the war was called the Civil War. The Civil War was the time when slavery in the USA was stopped and the violence and critical times were stopped for the USA's were free from the horrid times.