where did this begin?
It became widespread only with the invention of agriculture during the Neolithic Revolution about 11,000 years ago.
Slavery
 Thus, although it has existed among unusually resource-rich hunter gatherers, such as the American Indian peoples of the salmon-rich rivers of the Pacific Northwest Coast, slavery became widespread only with the invention of agriculture during the Neolithic Revolution about 11,000 years ago.

what is m-30 (michigan highway)? It is a state trunkline highway in the U.S. state of Michigan. what is the state symbol of this place mentioned? "The Wolverine State" what happened here during the 19th century? During the War of 1812, the United States forces at Fort Detroit surrendered Michigan Territory (effectively consisting of Detroit and the surrounding area) after a nearly bloodless siege in 1812. what is the origin of this war mentioned above? Historians have long debated the relative weight of the multiple reasons underlying the origin of this war. which country supported this war? UNANSWERABLE what were the opening strategies of the war? They were blockading the French navy and protecting British trade against French privateers. what was it doing to the slaves? The British Royal Navy's blockades and raids allowed about 4,000 African Americans to escape slavery by fleeing American plantations aboard British ships. what is the history behind the mentioned issue of slave? One of the type of slavery, sometimes called "just title servitude," was suffered by prisoners of war, debtors, and other vulnerable people.
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Slavery [SEP] Early history
Evidence of slavery predates written records and has existed in many cultures. Slavery is rare among hunter-gatherer populations because it requires economic surpluses and a high population density to be viable. Thus, although it has existed among unusually resource-rich hunter gatherers, such as the American Indian peoples of the salmon-rich rivers of the Pacific Northwest Coast, slavery became widespread only with the invention of agriculture during the Neolithic Revolution about 11,000 years ago. In the earliest known records, slavery is treated as an established institution. The Code of Hammurabi (c. 1760 BC), for example, prescribed death for anyone who helped a slave escape or who sheltered a fugitive.