Parliament’s Navigation Act required many goods imported into England to be carried on English ships (or ships from the goods’ country of origin). It was part of a broader mercantilist strategy: using law to steer trade through English shipping and ports. These rules helped build state power and commercial networks that later connected plantation goods, the slave trade, and finance.
After the monarchy was restored, the Navigation Act of 1660 strengthened restrictions on colonial trade and shipping. It limited trade to English (and colonial) ships and required key “enumerated” colonial commodities to be shipped through England. This tied colonial production more closely to English merchants, customs revenue, and port-city services such as credit and insurance.
The Navigation Act of 1663 (often called the Staple Act) required many European goods bound for English colonies to pass through England first. In practice, this boosted English re-export trade and customs administration. It also increased the role of English merchants and financiers in arranging long-distance supply chains that included plantation economies.
Charles II granted a royal charter to what became the Royal African Company, giving it privileged trading rights on the West African coast. The company soon became a major English participant in trafficking enslaved Africans to English colonies in the Americas. This institutionalized the link between state-backed monopoly rights, overseas coercion, and commercial profit-seeking.
The Bank of England was founded as a private bank designed to act as banker to the government, primarily to raise funds for war against France. By helping the state borrow more reliably, it strengthened Britain’s fiscal capacity (its ability to tax and borrow). Over time, this system interacted with profits and lobbying power from Atlantic commerce, including plantation economies dependent on enslaved labor.
Parliament passed the Trade with Africa Act, which effectively ended the Royal African Company’s monopoly on English trade with Africa. It opened the trade to private merchants who paid a levy to support forts and infrastructure. The result was a more competitive English slave-trading sector that could scale up with broader participation and finance.
The South Sea Company was founded as a public-private scheme to help manage and refinance Britain’s national debt. It illustrates how government borrowing and private investors could be linked through joint-stock structures. The company later gained slave-trade-related privileges, showing how state finance and Atlantic commerce could become entangled.
The Treaty of Utrecht reshaped imperial trade after the War of the Spanish Succession and included the Asiento de Negros, a contract to supply enslaved Africans to Spanish America. Britain’s Asiento rights were associated with the South Sea Company and came with strict limits (including an annual cap). The agreement shows how diplomacy and war outcomes could redistribute profitable coercive trades.
In 1720, South Sea Company shares surged and then collapsed in a major financial crisis. The episode reflected how expectations about overseas commerce—alongside government debt conversion—could fuel speculation. The bubble’s aftermath reinforced the importance of credible state finance and shaped debates over corporate privilege and regulation in Britain’s financial system.
In Somerset v Stewart, the Court of King’s Bench ruled that James Somerset could not be forcibly removed from England and shipped to Jamaica for sale. The decision was narrow, but it was widely understood as a landmark against slavery’s legal enforcement in England. It helped strengthen abolitionist organizing and arguments that slavery required explicit “positive law.”
Activists formed the Society for Effecting the Abolition of the Slave Trade to build public and parliamentary support for ending Britain’s role in the transatlantic slave trade. The group used research, printed materials, and petitions to change opinion and policy. This organized campaign connected moral arguments to practical political pressure on a trade deeply embedded in British Atlantic commerce.
Parliament passed the Slave Trade Act 1788 (Dolben’s Act), the first British law to regulate conditions on slave ships by limiting the number of captives carried relative to ship size. While it did not end the trade, it signaled growing willingness to legislate against its most brutal practices. The law also reflected how public scrutiny was reaching the commercial systems—shipping, credit, and insurance—that enabled the trade.
The Slave Trade Act received royal assent in March 1807 and took effect in May 1807, making it illegal for British subjects to participate in the transatlantic slave trade within the British Empire. This was a major turning point: it targeted the supply side of plantation slavery by attempting to cut off new forced arrivals. The act marked an endpoint for this timeline by changing the legal framework that had long linked Atlantic coercion, commerce, and British state power.
Atlantic Slave Trade, Capital Formation, and British Finance (1650-1807)