The Development of the Slave-Based Economy

How colonial crops became a source of wealth

By 1688, England’s colonies in the Caribbean and North America were already important sources of goods for Atlantic trade. Their economic value rested partly on cash crops: crops grown for sale rather than mainly to feed the people cultivating them. Caribbean colonies such as Barbados produced sugar, while Virginia and Maryland, in the Chesapeake region of North America, produced tobacco.

Growing and processing these crops required substantial labour. Sugar plantations, for example, depended on people undertaking difficult and dangerous work harvesting sugar cane. Colonial wealth therefore depended not just on possessing land, but on controlling the labour needed to make that land profitable.

A slave-based economy developed when enslaved people’s forced labour became central to production and trade. Enslaved Africans produced valuable exports, but plantation owners controlled the crops and received the proceeds. This was an economic system built on coercion, not a freely agreed exchange of work for wages.

Why planters increasingly used enslaved Africans

The origins of this system lay before the period 1688–c.1730. Portuguese colonists had used enslaved Africans to cultivate sugar on Atlantic islands before extending this system to Brazil. Other European powers, including England, subsequently developed plantation colonies dependent on African slavery.

European colonists also enslaved Indigenous Americans. However, disease introduced through European contact devastated Indigenous populations; violence and forced labour caused further deaths. This greatly reduced the labour available to colonists. It did not mean that Indigenous enslavement disappeared, but it helped drive the search for other workers.

English colonists initially made considerable use of indentured servants. These workers were bound to serve for a fixed term, often in return for passage across the Atlantic. Many travelled voluntarily, although others were transported as convicts. Their working conditions could be harsh, but their service was intended to end.

From the planters’ perspective, indentured labour had limitations. The number of servants arriving was insufficient to meet demand, high mortality disrupted the workforce, and surviving servants eventually completed their terms. Planters increasingly turned to enslaved Africans whom they could force to work for life. European claims that Africans were naturally suited to hard labour helped justify this exploitation; these were beliefs used by enslavers, not evidence of racial superiority or inferiority.

Trade supplied people; plantations exploited their labour

European demand transformed existing African slave trading into a much larger Atlantic system. Some African rulers and traders sold captives to Europeans in exchange for goods such as textiles, guns and alcohol. Captives could be taken through warfare, raids or kidnapping. The fact that African intermediaries participated does not remove the role of European traders and colonial planters in creating demand and profiting from it.

The Middle Passage carried enslaved Africans across the Atlantic to the Americas. Captives endured confinement, chains, overcrowding and disease; many died before reaching the colonies. Survivors were sold and forced to work.

The connections are often summarised as triangular trade. Manufactured goods travelled from Europe to Africa, enslaved people were transported from Africa to the Americas, and plantation products were shipped to Europe. This is a simplified model: real trading networks also connected different American colonies, and not every ship completed all three legs.

The crucial connection was between forced labour and export production. Selling captives brought income to traders, while the continuing exploitation of enslaved workers supplied sugar, tobacco and other goods for sale. Colonial production fitted mercantilist ambitions to use overseas possessions to increase the wealth and power of the home country.

Laws made slavery a lasting institution

The system became more firmly established through chattel slavery, which treated human beings as property. Enslaved people could be bought, sold and inherited. Their status was normally lifelong, and children born to enslaved mothers were themselves enslaved. This made slavery hereditary rather than a fixed period of service.

Colonial laws reinforced these arrangements. They protected slaveholders’ control and denied enslaved people control over their own bodies and labour. The resulting racial hierarchy associated African ancestry with enslavement, even though not every person of African descent was enslaved.

By 1700, Barbados had approximately 50,000 enslaved people. This shows how deeply slavery had become embedded in a major English sugar colony by the beginning of the eighteenth century.

Expansion from the Caribbean to mainland colonies

The Caribbean helped shape the development of slavery in mainland North America. Plantation owners from Barbados settled in southern Carolina and founded Charles Town in 1670. They brought experience of organising plantation production through enslaved labour.

By the end of the seventeenth century, wealthy rice planters relying on enslaved workers dominated the area around Charles Town. In the early eighteenth century, Carolina adopted slave laws based on those of Barbados. By 1715, the southern Carolina settlement had a Black majority because of the large enslaved population. North and South Carolina formally became separate colonies in 1729.

Elsewhere, enslaved workers harvested and processed tobacco in Virginia and Maryland. These examples show that the mainland colonies and the Caribbean were connected, but not economically identical: different regions specialised in different crops.

Why this development mattered

Between 1688 and c.1730, slavery became more deeply entrenched in important colonial economies. Export crops generated wealth for plantation owners and provided goods for merchants to trade. Caribbean sugar and mainland tobacco and rice therefore helped make colonies economically valuable to England and, subsequently, Britain.

This growth depended on violence, loss of freedom and the separation of families. Enslaved people resisted, including by escaping. In Jamaica, fugitives formed Maroon communities that resisted recapture. The development of the slave-based economy was therefore neither peaceful nor uncontested: it combined commercial expansion with legal coercion and continuing resistance.