Slavery was legal and practiced in every European colony in North America, at various points in history. Not all Africans who came to America were slaves; a few came even in the 17th century as free men, as sailors working on ships. In the early
colonial years, some Africans came as
indentured servants who were freed after a set period of years, as did many of the immigrants from
Europe. Such servants became free when they completed their term of indenture; they were also eligible for
headrights for land in the new colony in the
Chesapeake Bay region, where indentured servants were more common. As early as 1678, a class of free black people existed in North America. Various groups contributed to the growth of the free
Negro population: • children born to
colored free women (see
Partus sequitur ventrem) •
mulatto children born to
white indentured or free women •
mixed-race children born to free
Native American women (the
emancipation in the 1860s) •
freed slaves •
Maroons (or escaped slaves) • descendants of free black people who were never slaves Black people's labor was of economic importance in the export-oriented tobacco plantations of
Virginia and
Maryland, and in the rice and indigo plantations of
South Carolina. Between 1620 and 1780 about 287,000 slaves were imported into the
Thirteen Colonies, or 5 percent of the more than six million slaves brought from Africa. The great majority of transported Africans were shipped to sugar-producing colonies in the
Caribbean and to
Brazil, where life expectancy was short and slave numbers had to be continually replenished; this could be done at relatively low costs until the
Slave Trade Act 1807. The life expectancy of slaves was much higher in the Thirteen Colonies than in Latin America, the Caribbean or Brazil. This, combined with a very high birth rate, meant that the number of slaves grew rapidly, as the number of births exceeded the number of deaths, reaching nearly 4 million by the time of the
1860 United States census. From 1770 until 1860 the rate of natural population growth among American slaves was much greater than for the population of any nation in Europe, and was nearly twice as rapid as that of Britain. This was sometimes attributed to very high birth rates: "U.S. slaves, then, reached similar rates of natural increase to whites not because of any special privileges but through a process of great suffering and material deprivation". The
Southern Colonies (
Maryland,
Virginia, and
Carolina) imported more slaves, initially from long-established European colonies in the
West Indies. Like them, the mainland colonies rapidly increased restrictions that defined slavery as a racial
caste associated with African
ethnicity. In 1663
Virginia adopted the principle in slave law of
partus sequitur ventrem, according to which children were born into the status of their mother, rather than taking the status of their father, as was then customary for English subjects under
common law. Other colonies followed suit. This meant that children of slave mothers in colonial America were also slaves, regardless of their fathers' ethnicity. In some cases, this could result in a person's being legally white under Virginia law of the time, although born into slavery. According to Paul Heinegg, most of the free black families established in the Thirteen Colonies before the
American Revolution of the late 18th century descended from unions between white women (whether indentured servants or free) and African men (whether indentured servant, free, or enslaved). These relationships took place mostly among the
working class, reflecting the fluid societies of the time. Because such
mixed-race children were born to free women, they were free. Through use of court documents, deeds, wills, and other records, Heinegg traced such families from Virginia as the ancestors of nearly 80 percent of the free black people recorded in the
1790 United States census of
North Carolina. In addition, slave owners
manumitted slaves for various reasons: to reward long years of service, because heirs did not want to take on slaves, or to free slave
concubines and/or their children. Slaves were sometimes allowed to buy their freedom; they might be permitted to save money from fees paid when they were "hired out" to work for other parties. In the mid-to-late 18th century,
Methodist and
Baptist evangelists during the period of the
First Great Awakening ( 1730–1755) encouraged slave owners to free their slaves, in their belief that all men were equal before God. They converted many slaves to Christianity and approved black leaders as preachers; blacks developed
their own strain of Christianity. Before the
American Revolutionary War of 1775–1783, few slaves were manumitted; on the eve of the American Revolution, there was an estimated 30,000 free African Americans in Colonial America which accounts for about 5% of the total African American population with most of free African Americans being mixed race. Since the portion of free African Americans were so small and could possibly
pass as white, they were not deemed a threat to the White population to warrant anti-black legislation. However, historian Ira Berlin states that this figure could be as high as 25 percent due to errors in census collection, ambiguous status of runaway slaves, white-passing persons, and slaves who lived as if they were free but did not have the papers to prove it. The war greatly disrupted slave societies. Beginning with the 1775
proclamation of Lord Dunmore, governor of Virginia, the British recruited slaves of American revolutionaries to their
armed forces and promised them freedom in return. The
Continental Army gradually also began to allow blacks to fight, giving them promises of freedom in return for their service. Tens of thousands of slaves escaped from plantations or from other venues during the war, especially in the South. Some joined British lines or disappeared in the disruption of war. After the war, when the
British evacuated New York in November 1783, they transported more than 3,000
Black Loyalists and thousands of other
American Loyalists to resettle in
Nova Scotia and in what became
Upper Canada (part of present-day
Ontario). A total of more than 29,000 Loyalist refugees eventually departed from New York City alone. The British evacuated thousands of other slaves when they left Southern ports, resettling many in the Caribbean and others in England. In the first two decades after the war, the number and proportion of free Negroes in the United States rose dramatically: northern states abolished slavery, almost all gradually. But also many slave owners, in the
Upper South especially, inspired by the war's ideals, manumitted their slaves. From 1790 to 1810, the proportion of free blacks in the Upper South rose from less than 1% to overall, and nationally, the proportion of free blacks among blacks rose to 13%. The spread of
cotton cultivation in the
Deep South drove up the demand for slaves after 1810, and the number of manumissions dropped after this period. In the
antebellum period many slaves escaped to freedom in the North and in
Canada by running away, assisted by the
Underground Railroad, staffed by former slaves and by
abolitionist sympathizers. Census enumeration found a total of 488,070 "free colored" persons in the United States in 1860. ==Abolitionism==