Slavery

• 1. Introduction

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  Slavery is the ownership of a person as property, valued above all for their labour. In 2019, roughly 40 million people were still enslaved across the world, and 26 percent of them were children. That number persists despite slavery being illegal in nearly every nation on earth. The lone exception named in the record is Afghanistan, which has had legal private chattel slavery since 2026. Everywhere else, the practice survives in the shadows. More than half of today's slaves provide forced labour in the factories and sweatshops of the private sector. Others are trapped in debt bondage, in forced marriages, in domestic captivity, or pressed into service as child soldiers. How did an institution this old become this hidden? Why did it persist in some regions for centuries after others abolished it? What forces of money, land, and law decided where a human being could be bought and sold? The answers run from the Neolithic Revolution to the prison yards of the present day.

• 2. What The Word Carries

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  The word slave entered Middle English through the Old French esclave, which traces back to Byzantine Greek. The widely held view, known since the 18th century, links it to a Slavic tribe's self-name, because members of that people were so often captured and enslaved. By the 8th or 9th century the term had come to mean prisoner of war slave. A rival hypothesis, debated since the 19th century, derives the word instead from a Greek verb meaning to strip the enemy killed in battle, or to extract the spoils of war. Both versions have drawn criticism. The argument over a single word mirrors a larger one. Historians disagree about whether to call the victims slaves at all. Some prefer enslaved person, warning that the noun slave reduces human beings to property and perpetuates the crime in language. Others keep the older word because it is familiar, shorter, and because it captures an inhumanity that the gentler phrase, with its hint of autonomy, may soften. Drapetomania shows where naming can curdle into pseudoscience. It was a fabricated psychiatric diagnosis for a slave who desired freedom, with symptoms that included laziness and the urge to flee captivity.

• 3. The Shape Of Bondage

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  In chattel slavery, the slave is legally rendered the personal property of the owner, bought and sold at will like livestock. The Code of Hammurabi, dated to roughly 1760 BC, already treated slavery as an established institution and prescribed death for anyone who helped a slave escape. Ancient Greece and the Roman Empire considered chattel slavery a keystone of society. Not every system fit that mould. The Iroquois held captives for the stated purpose of assimilating them into Iroquoian culture, so there were several ways to escape captivity and the children of those in bondage became fully part of society. Bonded labour follows a different logic. A person works to pay off a debt by pledging themselves as collateral, and the duration may never be defined. Debt bondage can pass from one generation to the next, with children inheriting a parent's obligation. It is most prevalent in South Asia and is the most widespread form of slavery today. The Chukri system, found in parts of Bengal, coerces a woman or girl into prostitution to settle a debt. Money marriage settles a parent's debts by marrying off a child, usually a girl. Forced labour reaches wider still, sometimes folding in serfdom, conscription, and penal labour, all turning on illegal control rather than legal title.

• 4. The Mathematics Of Captivity

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  Economists have modelled the precise conditions that summon slavery into being and let it fade. One model holds that slavery grows attractive to landowners where land is abundant but labour is scarce, so paid workers can demand high wages. Where labour is plentiful and competition drives wages down, guarding slaves costs more than hiring free hands. By that logic, slavery and then serfdom declined in Europe as the population grew, then were reintroduced in the Americas and Russia where vast lands lay nearly empty. Simple, easily supervised tasks favoured the system, which is why large-scale monocrops such as sugarcane and cotton became its engines. On American plantations the gang system worked like an assembly line. Each work gang was split by an internal division of labour, every worker's pace bound to the others, as field hands chopped weeds around the cotton plants and plow gangs followed to stir the soil. Scottish economist Adam Smith argued that free labour beat slave labour, and that a free or republican government could scarcely end slavery because its lawmakers were often slave owners. In his Lectures on Jurisprudence he credited the combined power of king and clergy with setting the slaves at liberty, warning that where either authority was lacking, slavery still continues. The numbers turned criminal as well as moral. Researcher Siddharth Kara estimated that all forms of slavery generated 91.2 billion dollars in profits in 2007, second only to drug trafficking among global criminal enterprises.

• 5. Routes Out Of Africa

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  In the Senegambia region between 1300 and 1900, close to one-third of the population was enslaved. The continent was drained of its people through every possible route. Slaves crossed the Sahara to North Africa, traversed the Red Sea to the Arabian Peninsula, and moved along the multi-directional Indian Ocean trade toward Arabia, India, Madagascar, and beyond. Writing in Le Monde diplomatique, Elikia M'bokolo tallied the bleeding: roughly four million via the Red Sea, four million through the Swahili ports, perhaps nine million along the trans-Saharan caravan route, and eleven to twenty million across the Atlantic. The captives came from named peoples and named places. Traders seized Bantu peoples, the Zanj, from the interior of present-day Kenya, Mozambique, and Tanzania, and the enslaved gradually assimilated on Unguja and Pemba islands. As early as 696 the Zanj revolted against their Arab enslavers, and the Zanj Rebellion of 869 to 883 near Basra grew to involve over 500,000 slaves and free men. The Anti-Slavery Society estimated two million slaves in Ethiopia in the early 1930s, out of a population put at 8 to 16 million. Capture and transport killed on a staggering scale. Eduard Rüppell recorded that after a campaign in the southern Nuba mountains nearly 40,000 slaves were taken, yet through bad treatment, disease, and desert travel barely 5,000 reached Egypt. The trans-Atlantic trade exacted its own toll, with about 15 percent of slaves dying during the voyage and higher mortality during capture inside Africa itself.

• 6. Where It Lingered Longest

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  Chattel slavery survived longest in the Middle East, outlasting the suppression of the trans-Atlantic trade by generations. After the Islamic conquests of the 7th and 8th centuries, slavery was regulated by Islamic law across a succession of empires, from the Rashidun Caliphate through the Ottoman Empire that ran from 1517 to 1922. In the Ottoman capital of Constantinople, about one-fifth of the population were slaves, drawn from the Caucasus, Central Asia, and Eastern Europe as well as Africa. The geography of supply was vast and specific. The Bukhara slave trade in Central Asia fed the Middle East for thousands of years until the 1870s, and in the early 1840s the Uzbek states of Bukhara and Khiva together held about 900,000 slaves. Roughly 200,000 slaves, mainly Circassians, were imported into the Ottoman Empire between 1800 and 1909. A German orientalist named Gustaf Dalman reported seeing slaves in Muslim houses in Aleppo in 1899, and noted that boys could still be bought in Damascus and Cairo as late as 1909. Abolition came late and grudgingly here. International bodies under the League of Nations and the United Nations investigated through the 20th century, yet by the UN Ad Hoc Committee on Slavery in 1950 to 1951, legal chattel slavery still existed in Oman, Qatar, Saudi Arabia, the Trucial States, and Yemen. As recently as the 1960s, Saudi Arabia's slave population was estimated at 300,000. Saudi Arabia and Yemen abolished slavery in 1962, Dubai in 1963, and Oman last of all in 1970. Mauritania became the last country in the world to ban slavery, in 1981, though legal mechanisms to prosecute slaveholders were not implemented until 2007.

• 7. The Brutal New World

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  The first African slaves arrived in Hispaniola in 1501, the start of a system that would help trigger a revolution, a civil war, and countless rebellions. Enslavement already existed across the Americas before Europeans came, practiced by the Aztecs and by peoples such as the Inca, the Comanche, and the Haida. The Spanish conquest pressed natives into forced labour, and Bartolomé de las Casas, a Dominican friar present at the massacre of Hatuey, turned against the use of natives as slaves. Saint-Domingue stood out even in this company. By 1789 about 40,000 white colonists lived there, vastly outnumbered by the tens of thousands of African slaves on their sugarcane plantations, where blacks outnumbered whites by roughly ten to one. The colony has been described as one of the most brutally efficient ever built, with one-third of newly imported Africans dying within a few years. The Haitian Revolution of 1804, the only successful slave revolt in human history, brought an end to slavery in all French colonies by 1848. Brazil received more African slaves than any other country, nearly 5 million between 1501 and 1866, and was the last nation in the Western world to abolish the practice, in 1888. Forty percent of all slaves brought to the Americas were sent there. North America built its caste in law. The 1640 sentencing of John Punch to lifetime slavery, while two white servants who fled with him received lighter terms, is the first documented case making a racial distinction between black and white indentured servants. The 1655 case Johnson v. Parker went further, granting Anthony Johnson ownership of John Casor for life, the first judicial ruling in the Thirteen Colonies that a person who committed no crime could be held in servitude forever.

• 8. Old Institution New Faces

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  In 1865 the United States ratified the 13th Amendment, which banned slavery and involuntary servitude except as punishment for a crime whereof the party shall have been duly convicted. That clause kept a door open. It gave rise to convict leasing, which fell primarily on African Americans, and its logic survives in the prison labour of the present. The Prison Policy Initiative cites a 2020 US prison population of 2.3 million, with nearly all able-bodied inmates working in some fashion. The figures are concrete and stark. In Texas, Georgia, Alabama, and Arkansas, prisoners are paid nothing for their work; elsewhere they earn between 0.12 and 1.15 dollars per hour. In California, 2,500 incarcerated workers fought wildfires for one dollar an hour through a state programme that saves as much as 100 million dollars a year. The vocabulary of slavery now stretches across many disputed uses. Some libertarians and anarcho-capitalists call government taxation a form of slavery, and socialists and anarcho-syndicalists wield the term wage slavery against wage labour, a parallel Cicero is known to have suggested. East Asia carried its own long histories, from slavery in Shang dynasty China to the Korean nobi, who could make up to a third of the population yet stood at about 1.5 percent by 1858 before the system was abolished with the Gabo Reform of 1894. Slavery still did not vanish from Korea until 1930, under Imperial Japanese rule, a reminder that the institution rarely ends on the date the law declares.