American wealth did not emerge from land and machinery alone. It was created through labor—and for much of the nation’s history, Black labor was essential to the production, transportation, construction, and processing of the goods that made the United States prosperous.
That labor took many forms. It included people forced to work without wages under slavery, free Black craftspeople and maritime workers, farmers trapped in exploitative arrangements after emancipation, industrial workers during the Great Migration, and organized workers who challenged exclusion inside American labor movements. Their work helped build private fortunes, public institutions, commercial networks, and national economic power.
The forced labor behind an expanding economy
Enslaved African Americans cultivated tobacco, rice, indigo, sugar, and cotton; raised livestock; processed crops; worked in mines and workshops; constructed buildings; and performed skilled trades. Their labor generated value, but the law allowed enslavers—not the people doing the work—to control the earnings, property, movement, and often the families of those they enslaved.
Cotton became especially important during the nineteenth century. The National Park Service reports that by 1850, approximately 1.8 million of the nation’s 3.2 million enslaved people were growing and picking cotton. By 1860, enslaved labor produced more than two billion pounds of cotton annually, and roughly three-quarters of Southern cotton was sold internationally.
Between 1820 and 1860, cotton represented more than half the value of United States exports. By 1840, Southern cotton earned more than all other American exports combined. Those facts reveal why Black labor cannot be treated as a regional footnote: cotton helped connect plantations to ports, banks, insurers, shipping companies, trading houses, and manufacturers on both sides of the Atlantic.
The North was connected to the system
The wealth generated through slavery did not stop at the borders of slaveholding states. Northern textile mills processed cotton cultivated by enslaved workers. Merchants financed and shipped plantation commodities. Manufacturers sold clothing, tools, and other supplies into slave-based markets. Financial institutions extended credit connected to land, crops, and enslaved people who were treated as property.
National Park Service research on Lowell, Massachusetts, explains that the city’s textile economy depended upon slave-grown cotton. One estimate cited by the Park Service calculates that enslaved people performed roughly 33 million hours of labor each year to supply Lowell’s mills. Other New England businesses produced coarse shoes and cloth intended for enslaved laborers or supplied Caribbean plantations with provisions.
This did not mean that every Northern worker or household owned enslaved people. It means that the national economy contained connected systems. Raw materials produced through forced labor could become freight for ships, inventory for merchants, work for mills, collateral for lenders, and finished products for consumers. The profits could travel even when the workers whose labor created the commodities could not.
Black workers built public symbols of the nation
Black labor also helped construct the physical seat of the federal government. National Archives records document that enslaved African Americans performed much of the labor used to build the White House and the United States Capitol. Wage rolls and payment records show that the government often paid enslavers for the workers’ labor rather than paying the workers themselves.
That history exposes a central American contradiction: people denied citizenship and freedom helped build structures intended to represent the republic. Their work became part of the nation’s permanent landscape even when their names were often omitted from its familiar story.
Freedom did not bring an equal economic starting point
Emancipation ended legal slavery, but it did not distribute the wealth created through generations of uncompensated labor. Most freed families received neither land nor payment for their past work. The National Archives notes that without federal land compensation, many formerly enslaved people were pushed into sharecropping, tenant farming, convict leasing, and other labor systems that kept them economically dependent.
Sharecropping could leave families owing landowners or merchants after a full year of work. Convict leasing used racially unequal arrests and prosecutions to supply forced labor to private businesses and public projects. Segregation and discrimination restricted access to better-paying jobs, unions, credit, education, housing, and property ownership.
Yet Black families and communities continued to build. Farmers acquired land when they could. Skilled workers created businesses. Mutual-aid societies provided insurance and burial assistance. Churches and schools pooled resources. Black-owned banks, newspapers, stores, and professional practices circulated money within communities that mainstream institutions frequently excluded.
Black labor moved with American industry
During the Great Migration, approximately six million Black people moved from the South to Northern, Midwestern, and Western communities between the 1910s and 1970s. The National Archives identifies racial violence, Jim Crow oppression, and the pursuit of economic and educational opportunity among the forces behind this movement.
Black workers entered steel mills, automobile plants, meatpacking operations, railroads, shipyards, postal facilities, domestic service, and wartime industries. They contributed to the industrial capacity that made American cities and corporations powerful. At the same time, they often confronted segregated job classifications, unequal pay, exclusion from unions, and confinement to the most dangerous or least secure positions.
Black workers also organized. National Archives research records Black labor action before the Civil War, including an 1835 strike by Black caulkers at the Washington Navy Yard. Later generations formed unions and applied pressure to employers and the federal government. Their campaigns linked fair employment to citizenship, demonstrating that economic rights and civil rights could not be separated.
Contribution and exclusion must be studied together
It is not enough to say that Black people worked hard. The more revealing questions are: Who controlled the work? Who received the profits? Who gained property and access to credit? Who inherited assets, and who inherited debt or exclusion?
In 1860, according to the National Park Service, the market value assigned to enslaved people exceeded the combined invested value of the nation’s railroads, factories, and banks. That statistic does not measure the human value of Black people. It demonstrates the enormous financial importance slaveholders placed on controlling their bodies and future labor.
American prosperity was produced through both freedom and coercion, wages and stolen labor, innovation and exclusion. Black workers contributed within all of those conditions. They helped grow the crops, move the goods, build the structures, operate the machines, sustain households, serve the public, and organize for fairer workplaces.
Recognizing Black labor as a foundation of American wealth does more than correct the past. It helps explain why the nation accumulated so much—and why the benefits of that accumulation were distributed so unequally.
Sources and further reading
- National Park Service — Industry and Economy During the Civil War
- National Park Service — Cotton Economy
- National Park Service — Slavery as a Cause of the Civil War
- National Park Service — Anti-Slavery in Lowell
- National Park Service — American Economy
- National Archives — Enslaved Workers Built the White House and Capitol
- National Archives — No Pensions for Ex-Slaves
- National Archives — The Great Migration
- National Archives — African Americans and the American Labor Movement
- Smithsonian NMAAHC — African Americans at Work
- Library of Congress — Slavery and the Plantation System