It was not established, as that word is commonly used. Slavery has existed worldwide throughout human history. Only its ELIMINATION was "established" by plan and concerted action and only within the last 200 years.
Because it was bad.
: It certainly was. And it came to be regarded as an affront to the dignity of all mankind. And more specifically, the slave traders themselves conducted themselves in such a manner as to outrage any who saw how they did it.
And more pragmatically, free labor has a hard time competing with slave labor, so any man not a slave has a vested economic interest in prohibiting slavery.
But ultimatey, it was banned for one reason, and pretty much one reason alone. The tireless efforts of British Minister of Parliament William Wilburforce. His efforts more than anything else were responsible for the abolition of the slave trade.
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Every state has outlawed slavery, so....
Slavery was outlawed.
The thirteenth amendment outlawed slavery in the United States.
NIt outlawed slavery in the Northwest Territory Thanks
it isn't outlawed there are slaves in Italy
During the 19th century, slavery was prevalent in the southern United States, where African Americans were treated as property and forced to work on plantations.
The Thirteenth Amendment to the United States Constitution abolished slavery and involuntary servitude, except as punishment for a crime.
Slavery
Slavery was outlawed in the United States through the Emancipation Proclamation, issued by President Abraham Lincoln on January 1, 1863. This executive order declared all slaves in Confederate states to be free. The Thirteenth Amendment to the U.S. Constitution, ratified in 1865, permanently abolished slavery throughout the country.
The North never had slavery.
The Abolitionists
slavery