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IB DP History Study Notes

18.7.4 Causes of the Decline of the Atlantic Slave Trade

From the 16th to the 19th centuries, the Atlantic Slave Trade was instrumental in shaping economies and societies across continents. However, the closing stages of this period witnessed a significant decline in the trade. This section investigates the intertwining causes behind this downturn.

Industrialisation

The advent of the Industrial Revolution brought profound changes to the traditional economies of Europe and the Americas, impacting the slave trade.

Technological Advancements

  • The introduction of machinery, such as the cotton gin invented by Eli Whitney in 1793, revolutionised the processing of cotton.
  • Steam-powered machines and locomotives changed manufacturing and transportation, reducing reliance on manual, slave-driven labour.
  • Mechanisation in industries such as textiles led to the mass production of goods, increasing the demand for wage labour over slave labour.

Economic Shifts

  • The economic focus transitioned from agriculture-based economies, which were heavily reliant on slave labour, to industrial-based economies, less dependent on human brawn.
  • Increased efficiency and productivity in industrial processes made slave-driven production methods obsolete and uneconomical. These changes mirrored the broader economic impact of European exploration and conquest in the Americas.
  • The development of capitalist economies favoured free labour markets, which clashed with the inflexibility of slave systems.

Economic Changes

With shifts in agricultural practices and the growing impracticality of slave labour, economic factors played a significant role in the decline of the Atlantic Slave Trade.

Changes in Agricultural Practices

  • The cultivation of less labour-intensive crops reduced the demand for slave labour.
  • New agricultural techniques and crop rotations improved yields, diminishing the need for large numbers of slaves.
  • The European sugar beet industry began to thrive, competing with cane sugar from the colonies and undercutting the slave-driven plantation economy.

Cost Considerations

  • Insurrection and rebellion among enslaved people led to increased costs for security and control measures on plantations and during transportation.
  • The human and financial costs of suppressing revolts, combined with increased insurance premiums, added to the financial burden of the slave trade.

Economic Viability

  • The comparative inefficiency of slave labour became more apparent when juxtaposed with the increasing productivity of paid labour.
  • Economic arguments presented by thinkers like Adam Smith in 'The Wealth of Nations' highlighted the economic inefficiencies of slavery, contributing to a shift in economic thinking. This shift in economic thought can be compared to the social, cultural, and economic developments in Meiji Japan.

The Abolitionist Movement

The abolitionist movement was perhaps the most direct force in challenging the morality and legality of the slave trade, contributing to its decline.

Humanitarian Advocacy

  • Moral and religious arguments against the inhumanity of slavery were disseminated through pamphlets, sermons, and books.
  • Influential advocates like William Wilberforce tirelessly campaigned for the end of the slave trade, leading to legislative action. Their efforts can be seen as part of a broader movement for reform, similar to the changes during the Enlightenment era.

Legal Milestones

  • Legal decisions such as the Mansfield Judgment of 1772 gradually eroded the legal foundations of slavery in England.
  • The Slave Trade Act of 1807, followed by the Slavery Abolition Act of 1833, were critical in legally dismantling the slave trade infrastructure within the British Empire.

Public Campaigns

  • Grassroots campaigns, including the mass petition movements of the 1780s and the sugar boycotts, demonstrated widespread public opposition to slavery.
  • The formation of abolitionist groups like the Society for Effecting the Abolition of the Slave Trade galvanised public opinion and activism, akin to the public influence seen during the French Revolution.

Rise of Legitimate Commerce

As legitimate commerce grew, the economic foundations of the Atlantic Slave Trade began to crumble, leading to its decline.

Alternative Trade

  • The exploration of Africa revealed a wealth of natural resources that European powers sought to exploit, including palm oil, which was essential for lubricating machinery.
  • The demand for raw materials for industries provided new opportunities for commerce that did not involve the slave trade.

International Relations

  • International diplomacy began to play a more significant role, with treaties such as the 1817 Anglo-Spanish Treaty pressuring countries to reduce or eliminate their involvement in the slave trade.
  • Conferences like the Berlin Conference in 1884-85, while focused on the partition of Africa, also dealt with issues related to the ending of the slave trade.

Development of Infrastructure

  • The development of railways and telegraph lines in Africa, often by colonial powers, made it easier to conduct trade over long distances without relying on slave caravans. These infrastructural developments were reminiscent of the changes brought about by Absolutist monarchs like Louis XIV and Peter the Great.
  • The rise of steamships reduced the sailing time and increased the volume of goods that could be traded, making legal commerce more profitable and efficient compared to the slave trade.

The intersection of these factors – industrialisation, economic shifts, the abolitionist movement, and the rise of legitimate commerce – brought about the decline of the Atlantic Slave Trade. The gradual realisation of the inhumanity of slavery, combined with the economic and political transformations of the period, resulted in a sustained effort to abolish the trade. These shifts not only marked the end of an era defined by the exploitation of enslaved people but also set the stage for new economic systems and societal changes that would shape the post-slavery world. Understanding the causes of the decline of the Atlantic Slave Trade is crucial for comprehending the broader historical processes that led to the modernisation of societies on both sides of the Atlantic.

FAQ

The Enlightenment era brought about changing attitudes towards race and human rights, which greatly influenced the decline of the Atlantic slave trade. Philosophers like John Locke and Jean-Jacques Rousseau argued for the fundamental rights and equality of all men, challenging the perceived racial hierarchies that justified slavery. These ideas permeated society and were taken up by abolitionists who argued that the slave trade was not only inhumane but also a violation of natural rights. The growing belief in universal human rights made the legal and social acceptance of slavery increasingly untenable, leading to the development of anti-slavery laws and the eventual decline of the trade.

The resistance and rebellions of enslaved people significantly undermined the Atlantic slave trade by increasing the economic costs and risks associated with slavery. Rebellions, such as the Haitian Revolution led by Toussaint Louverture, not only resulted in direct economic loss through the destruction of plantations but also demonstrated that the institution of slavery was becoming increasingly unsustainable. These uprisings forced slave owners to spend more on security and control measures, thereby raising the cost of maintaining slave systems. The fear of rebellion also prompted legislative actions aimed at controlling or ending the trade, as the economic and human costs of suppression grew too high.

International diplomacy and treaties played a crucial role in the decline of the Atlantic slave trade by creating formal agreements between nations to limit or end their involvement in the trade. The early 19th century saw a series of treaties, such as the 1817 Anglo-Spanish Treaty and the 1815 Treaty of Paris, in which European powers agreed to curtail the slave trade. Britain, as a dominant naval power, enforced these treaties at sea, capturing illegal slave ships and liberating the enslaved. The concerted diplomatic efforts led to a gradual squeezing of the trade routes and markets, making it increasingly difficult for the trade to continue on the same scale as before.

During the late 18th and early 19th centuries, economic theories began to challenge the efficiency and morality of the slave trade. Classical economists like Adam Smith argued that free labour was not only more ethical but also more economically efficient than slave labour. Smith contended that free workers, motivated by wages, would be more productive than enslaved individuals working under coercion. Furthermore, David Ricardo's principle of comparative advantage suggested that countries would benefit from specialising in goods they could produce most efficiently. These theories underpinned a shift towards a free labour market economy, which ultimately rendered the slave trade economically outdated and indefensible.

Technological innovations in agriculture, particularly in the 18th and 19th centuries, played a considerable role in the decline of the Atlantic slave trade by reducing the dependency on slave labour. The mechanisation of farm tools and the introduction of crop rotation systems led to higher productivity and efficiency in agriculture, which diminished the necessity for large numbers of enslaved workers. Inventions like Jethro Tull’s seed drill improved the precision and control of crop planting, leading to better yields with less labour. As these technologies became widespread, the economic model supporting slavery weakened, contributing to the decline of the trade.

Practice Questions

Evaluate the extent to which industrialisation contributed to the decline of the Atlantic slave trade in the 19th century.

The impact of industrialisation on the decline of the Atlantic slave trade was significant. Industrialisation introduced new machinery which lessened the reliance on slave labour by increasing the efficiency of production processes. This was evident in the rapid mechanisation of textile manufacturing in Britain, which shifted labour demands to wage-earning, factory-based workers. The development of the steam engine and other innovations in transport and manufacturing underpinned a wider economic transition towards industrial capitalism, which was incompatible with the inflexibility of slave labour. Thus, industrialisation was a pivotal factor that substantially contributed to the eventual abolition of the Atlantic slave trade.

Discuss how the abolitionist movement led to the decline of the Atlantic slave trade.

The abolitionist movement was instrumental in the decline of the Atlantic slave trade by mobilising public opinion and influencing legislation. Its leaders, such as William Wilberforce, were adept at galvanising support through both emotional appeals and economic arguments, highlighting the moral depravity and inefficiency of slavery. The movement's success in passing the Slave Trade Act of 1807 and the Slavery Abolition Act of 1833 in Britain, alongside similar laws in other countries, legally curtailed the trade. Moreover, grassroots campaigns, such as the sugar boycotts, showcased the power of collective action, effectively undermining the economic foundations of the slave trade through social activism.

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