Slavery was a transatlantic institution. However, it developed distinct characteristics in British North America. By 1750, slavery was legal in every North American English colony, but local economic imperatives, demographic trends, and cultural practices all contributed to distinct colonial variants of slavery.

Virginia, the oldest of the English mainland colonies, imported its first slaves in 1619. Virginia planters built larger and larger estates and guaranteed that these estates would remain intact through the use of primogeniture (where a family’s estate would descend to the eldest male heir) and the entail (a legal procedure that prevented the breakup and sale of estates). This distribution of property, which kept wealth and property consolidated, guaranteed that the great planters would dominate social and economic life in the Chesapeake. This system also fostered an economy dominated by tobacco. By 1750 there were approximately 100,000 African slaves in Virginia, at least 40% of the colony’s total population. The majority of these slaves worked on large estates under the gang system of labor, working from dawn to dusk in groups with close supervision by a white overseer or enslaved “driver” who could use physical force to compel labor.

Virginians used the law to protect the interests of slaveholders. In 1705 the House of Burgesses passed its first comprehensive slave code. Earlier laws had already guaranteed that the children of enslaved women would be born slaves, conversion to Christianity would not lead to freedom, and owners could not free their slaves unless they transported them out of the colony. Slave owners could not be convicted of murder for killing a slave; conversely, any black Virginian who struck a white colonist would be severely whipped. Virginia planters used the law to maximize the profitability of their slaves and closely regulate every aspect of their daily lives.

In South Carolina and Georgia, slavery was also central to colonial life but specific local conditions created a very different system of slavery. Georgia was founded by the philanthropist George Oglethorpe, who originally banned slavery from the colony. But by 1750 slavery was legal throughout the region. South Carolina had been a slave colony from its founding and, by 1750, was the only mainland colony with a majority enslaved African population. The Fundamental Constitutions of Carolina, co-authored by the philosopher John Locke in 1669, explicitly legalized slavery from the very beginning. Many early settlers in Carolina were slaveholders from British Caribbean sugar islands, and they brought their brutal slave codes with them. Defiant slaves could legally be beaten, branded, mutilated, even castrated. In 1740 a new law stated that killing a rebellious slave was not a crime and even the murder of a slave was treated as a minor misdemeanor. South Carolina also banned the freeing of slaves unless the freed slave left the colony.

Despite this brutal regime, a number of factors combined to give South Carolina slaves more independence in their daily lives. Rice, the staple crop underpinning the early Carolina economy, was widely cultivated in West Africa, and planters commonly requested that merchants sell them slaves skilled in the complex process of rice cultivation. Slaves from Senegambia were particularly prized. The expertise of these slaves contributed to one of the most lucrative economies in the colonies. Rice production soared from 20 million pounds in 1720 to nearly 80 million pounds by 1780. The swampy conditions of rice plantations, however, fostered dangerous diseases. Malaria and other tropical diseases spread, and caused many owners to live away from their plantations. These elites, who commonly owned a number of plantations, typically lived in Charleston townhouses to avoid the diseases of the rice fields. West Africans, however, were far more likely to have a level of immunity to malaria (due to a genetic trait that also contributes to higher levels of sickle cell anemia), reinforcing planters’ racial belief that Africans were particularly suited to labor in tropical environments.

With plantation owners often far from home, Carolina slaves had less direct oversight than those in the Chesapeake. Furthermore, many Carolina rice plantations used the task system to organize slave labor. Under this system, slaves were given a number of specific tasks to complete in day, but once those tasks were complete slaves often had time to grow some crops of their own on garden plots allotted by plantation owners. These slaves participated in a thriving underground market that allowed them a degree of economic autonomy. Carolina slaves also had an unparalleled degree of cultural autonomy. Carolina’s black majority, most of whom were imported directly from West Africa and relative lack of direct oversight allowed for the retention of many African cultural and religious practices. Syncretic languages like Gullah and Geechee contained many borrowed African terms, and traditional African basket weaving (often combined with Native American techniques) survive in the region to this day.

This unique Low Country slave culture contributed to the Stono Rebellion in September 1739. On a Sunday morning while planters attended church, a group of about 80 slaves set out for Spanish Florida under a banner that read “Liberty!,” burning plantations and killing at least 20 white settlers as they marched. They were headed for Fort Mose, a free black settlement on the Georgia-Florida border, emboldened by the Spanish Empire’s offer of freedom to any English slaves. Though the Stono Rebellion was ultimately unsuccessful – the local militia defeated the rebels in battle, captured and executed many of the slaves, and sold others to the sugar plantations of the West Indies – it was a violent reminder to South Carolina planters that their slaves would fight for freedom.

Slavery was also an important institution in the mid-Atlantic colonies. While New York, New Jersey, and Pennsylvania never developed plantation economies, slaves were often employed on larger farms growing cereal grains. Enslaved Africans worked alongside European tenant farmers on New York’s Hudson Valley “patroonships,” huge tracts of land granted to a few early Dutch families. As previously mentioned, slaves were also a common sight in Philadelphia, New York City, and other ports where they worked in the maritime trades and domestic service. New York City’s economy was so reliant on slavery that over 40% of its population was enslaved by 1700, while 15-20% of Pennsylvania’s colonial population was enslaved by 1750. In New York, the high density of slaves and a particularly diverse European population increased the threat of rebellion. A 1712 slave rebellion in New York City resulted in the deaths of 9 white colonists. In retribution, 21 slaves were executed and 6 others committed suicide before they could be burned alive. In 1741, another planned rebellion by African slaves, free blacks, and poor whites was uncovered, unleashing a witch-hunt that only stopped after 32 slaves and free blacks and 5 poor whites were executed. Another 70 slaves were deported, likely to the sugar cane fields of the West Indies.

Increasingly uneasy about the growth of slavery in the region, Quakers were the first group to turn against slavery. Quaker beliefs in radical non-violence and the fundamental equality of all human souls made slavery hard to justify. Most commentators argued that slavery originated in war, where captives were enslaved rather than executed. To pacifist Quakers, then, the very foundation of slavery was illegitimate. Furthermore Quaker belief in the equality of souls challenged the racial basis of slavery. By 1758, Quakers in Pennsylvania disowned members who engaged in the slave trade, and by 1772 slave-owning Quakers could be expelled from their meetings. These local activities in Pennsylvania had broad implications as the decision to ban slavery and slave trading was debated in Quaker meetings throughout the English-speaking world. The free black population in Philadelphia and other northern cities also continually agitated against slavery.

Slavery as a system of labor never took off in Massachusetts, Connecticut, or New Hampshire, though it was legal throughout the region. The absence of cash crops like tobacco or rice minimized the economic use of slavery. In Massachusetts, only about 2% of the population was enslaved as late as the 1760s. The few slaves in the colony were concentrated in Boston along with a sizeable free black community that made up about 10% of the city’s population. While slavery itself never really took root in New England, the slave trade was a central element of the region’s economy. Every major port in the region participated to some extent in the transatlantic trade – Newport, Rhode Island alone had at least 150 ships active in the trade by 1740 – and New England also provided foodstuffs and manufactured goods to West Indian plantations.