Interstate Slave Trade

The internal slave trade in the United States, also known as the domestic slave trade, the Second Middle Passage and the interregional slave trade, was the mercantile trade of enslaved people within the United States. It was most significant after 1808, when the importation of slaves from Africa was prohibited by federal law. Historians estimate that upwards of one million slaves were forcibly relocated from the Upper South, places like Maryland, Virginia, Kentucky, North Carolina, Tennessee, and Missouri, to the territories and states of the Deep South, especially Georgia, Alabama, Louisiana, Mississippi, Arkansas, and Texas.

Economists say that transactions in the inter-regional slave market were driven primarily by differences in the marginal productivity of labor, which were based in the relative advantage between climates for the production of staple goods. The trade was strongly influenced by the invention of the cotton gin, which made short-staple cotton profitable for cultivation across large swathes of the upland Deep South (the Black Belt). Previously the commodity was based on long-staple cotton cultivated in coastal areas and the Sea Islands.

The disparity in productivity created arbitrage opportunities for traders to exploit, and it facilitated regional specialization in labor production. Due to a lack of data, particularly with regard to slave prices, land values, and export totals for slaves, the true effects of the domestic slave trade, on both the economy of the Old South and general migration patterns of slaves into southwest territories, remain uncertain. These have served as points of contention among economic historians. The physical effect of forced labor (on remote plantation camps plagued with yellow fever, cholera, and malaria), and social-emotional effect of family separation in American slavery, was nothing short of catastrophic.

History

The history of the domestic slave trade can very clumsily be divided into three major periods:

* 1776 to 1808: This period began with the Declaration of Independence and ended when the importation of slaves from Africa and the Caribbean was prohibited under federal law in 1808; the importation of slaves was prohibited by the Continental Congress during the American Revolutionary War but resumed locally afterwards, primarily through the ports of Wilmington, North Carolina (until 1785), Savannah, Georgia (until 1798), and Charleston, South Carolina (reopened the transatlantic slave trade in December 1803 and imported 39,075 enslaved people of African descent between 1804 and 1808). Some slaves shipped to these ports were resold locally, others were forwarded on the Natchez and New Orleans slave markets of the lower Mississippi.
* 1808 to Indian removal and invention of long-staple cotton gin (1830s): This period of national expansion can arguably be backdated to the Louisiana Purchase of 1803, and includes the cession of Spanish West Florida in 1821. In the years immediately following the War of 1812, the most active slave markets in the deep South were at Algiers, Louisiana, and Natchez, Mississippi. One New Orleans historian found evidence of that the "queen of the trade", as New Orleans was later known, was open for business in the first years of the 19th century, but "it was not till the 1820s had well set in that the number of American slave merchants grew to impressive proportions" and by 1827 "New Orleans had become the chief center of the slave trade in the lower South"

* 1830s to American Civil War: This period began when the combination of new lands open for settlement and higher profits for cotton growers led to a massive population transfer of enslaved people from the Chesapeake region to the Mississippi River basin. This era also saw the rise of the ever-more vocal and organized abolitionist movement in the United States, as chronicled and publicized by journals like '' The Liberator'', which was established in 1831.

End of the slave trade

The domestic slave trade wilted during American Civil Warthere was a measurable price drop between 1860 and 1862, due to "market uncertainty" discouraging speculators. In May 1861, a "Southern Mississippian" who seemed to oppose secession even though "no man in Mississippi has a larger proportion of his property in negroes" wrote the ''Louisville Courier'' that "The secessionists are carrying out the principles and wishes of the abolitionists. Likely negroes could not be sold here at $500 in good money. Negro traders are as scarce here as in Boston." Still, the business remained brisk and prices rose in the protected interior of the CSA, and according to historian Robert Colby, "Confederates nevertheless interpreted the health of the slave trade as embodying that of their nation."

Times got still harder for traders when the Union blockade and total U.S. military control of the Mississippi River prevented the trafficking of people from, say, rural Missouri to New Orleans. But the slave trade, as an integral part of slavery, persisted throughout Confederate-controlled territory until very nearly the end of the war. Ziba B. Oakes was still listing slaves in Charleston, South Carolina newspaper ads in November 1864. A handful of American-flagged ships were still moving enslaved people from Africa to Cuba and Brazil until 1867, when American participation in the slave trade ended once and for all.

Economics

Slavery was a massive element of the U.S. national economy and even more so the economy of the South: "In 1860, enslaved people were worth more than $3 billion (~$ in ) to their owners. In today's economy, that would be equivalent to $12.1 trillion or 67 percent of the 2015 U.S. gross domestic product...The unpaid fruits of their labors created an interest so strong that between 1861 and 1865, Confederate leaders staked hundreds of thousands of lives and the future of their civilization on it." As told by historian Frederic Bancroft, "Slave trading was considered a sign of enterprise and prosperity."

The internal slave trade among colonies emerged in 1760 as a source of labor in early America. It is estimated that between 1790 and 1860 approximately 835,000 slaves were relocated to the American South.

The biggest sources for the domestic slave trade were "exporting" states in the Upper South, especially Virginia and Maryland, and as well as Kentucky, North Carolina, Tennessee, and Missouri. From these states most slaves were imported into the Deep South, to the "slave-consuming states," especially Georgia, Alabama, Mississippi, and Louisiana. Robert Fogel and Stanley Engerman attribute the larger proportion of the slave migration due to planters who relocated their entire slave populations to the Deep South to develop new plantations or take over existing ones. Walter Johnson disagrees, finding that only one-third of the population movement south was due to wholesale relocation of slave owner and chattel, while the other two-thirds of the shift was due to the commerce in slaves.

Contributing factors

Soil exhaustion and crop changes

Historians who argue in favor of soil exhaustion as an explanation for slave importation into the Deep South posit that exporting states emerged as slave producers because of the transformation of agriculture in the Upper South. By the late 18th century, the coastal and Piedmont tobacco areas were being converted to mixed crops because of soil exhaustion and changing markets. Because of the deterioration of soil and an increase in demand for food products, states in the upper South shifted crop emphasis from tobacco to grain, which required less labor. This decreased demand left states in the Upper South with an excess supply of labor.

Land availability from Indian removal

With the forced Indian removal by the US making new lands available in the Deep South, there was much higher demand there for workers to cultivate the labor-intensive sugar cane and cotton crops. The extensive development of cotton plantations created the highest demand for labor in the Deep South.

Cotton gin

At the same time, the invention of the cotton gin in the late 18th century transformed short-staple cotton into a profitable crop that could be grown inland in the Deep South. Settlers pushed into the South, expelling the Five Civilized Tribes and other Native American groups. The cotton market had previously been dominated by the long-staple cotton cultivated primarily on the Sea Islands and in the coastal South Carolina Lowcountry. The consequent boom in the cotton industry, coupled with the labor-intensive nature of the crop, created a need for slave labor in the Deep South that could be satisfied by excess supply further north.

The increased demand for labor in the Deep South pushed up the price of slaves in markets such as New Orleans, which became the fourth-largest city in the country based in part on profits from the slave trade and related businesses. The price differences between the Upper and Deep South created demand. Slave traders took advantage of this arbitrage opportunity by buying at lower prices in the Upper South and then selling slaves at a profit after taking or transporting them further south. Some scholars believe there was an increasing prevalence in the Upper South of "breeding" slaves for export. The proven reproductive capacity of enslaved women was advertised as selling point and a feature that increased value.

Resolve financial deficits

Although not as significant as the exportation of slaves to Deep South, farmers and land owners who needed to pay off loans increasingly used slaves as a cash substitute. This had also contributed to the growth of the internal slave trade.

Statistics

Economic historians have offered estimates for the annual revenue generated by the inter-regional slave trade for exporters that range from $3.75 to $6.7 million.

The demand for prime-aged slaves, from the ages of 15 to 30, accounted for 70 percent of the slave population relocated to the Deep South. Since the ages of slaves were often unknown by the traders themselves, physical attributes such as height often dictated demand in order to minimize asymmetric information.

Robert Fogel and Stanley Engerman estimated that the slave trade accounted for 16 percent of the relocation of enslaved African Americans, in their work ''Time on the Cross''. This estimate, however, was severely criticized for the extreme sensitivity of the linear function used to gather this approximation. A more recent estimate, given by Jonathan B. Pritchett, has this figure at about 50 percent, or about 835,000 slaves total between 1790 and 1850. Without the inter-regional slave trade, it is possible that forced migration of slaves would have occurred naturally due to natural population pressures and the subsequent increase in land prices. In 1965, William L. Miller contended that, "it is even doubtful whether the interstate slave traffic made a net contribution to the westward flow of the population." Historian Charles S. Sydnor wrote in 1933, "The number of slaves brought into Mississippi either by slavetraders or by immigrant masters cannot be precisely stated." Robert Gudmestad found that "Disentangling the various strands of forced migration is like trying to untie the Gordian knot. Migration with owners, planter purchase, and the interstate trade blended together to form a seamless whole."

Importation, piracy, and interstate kidnapping

The transatlantic slave trade was not prohibited under federal law until 1808. Imports from Africa to Southern states were ongoing from 1776 until that time, most often through the ports of Charleston and Savannah. Imports to Cuba, Brazil, and America often involved similar personnel and practices. Post-1808 importation of slaves to the United States from the Caribbean, South America, and Africa was illegal but piracy continued until the opening of the American Civil War. Piracy was most active in the 1810s, with New Orleans and Amelia Island off Spanish Florida being key centers, and in the 1850s, when pro-slavery activists sought to drive down slave prices by illegally importing directly from Africa.

Kidnapping into slavery in the United States was an ongoing issue. Unaccompanied children and people of color traveling to port cities and border states were particularly vulnerable. There are multiple accounts of armed gangs breaking into the homes of free people in the dead of night and carrying away whole families. The lucky ones were sometimes redeemed from the local slave jail by friends or lawyers before they were shipped south.

Breeding of slave children for sale

According to Frederic Bancroft in ''Slave-Trading in the Old South'' (1931) young female slaves were also considered an excellent financial investment: "Not only real estate, but also stocks, bonds and all other personal property were little prized in comparison with slaves...Absurd as it now seems, slaves, especially girls and young women, because of prospective increase, were considered the best investment for persons of small means."

Profits

Irish economic theorist John Elliot Cairnes suggested in his work ''The Slave Power'' that the inter-regional slave trade was a major component in ensuring the economic vitality of the Old South. Many economic historians, however, have since refuted the validity of this point. The general consensus seems to support Professor William L. Miller's claim that the inter-regional slave trade "did not provide the major part of the income of planters in the older states during any period."

The returns gained by traders from the sale price of slaves were offset by both the fall in the value of land, that resulted from the subsequent decrease in the marginal productivity of land, and the fall in the price of output, which occurred due to the increase in market size as given by westward expansion. Kotlikoff suggested that the net effect of the inter-regional slave trade on the economy of the Old South was negligible, if not negative.

The profits realized through the sale and shipment of enslaved people were in turn reinvested in banking, railroads, and even colleges. A striking example of the connection between the domestic slave trade and higher education can be found in the 1838 sale of 272 slaves by the Maryland Jesuits to Louisiana; a small portion of the proceeds of the sale was used to pay down the debts of Georgetown College. Caroline Donovan endowed a chair at Johns Hopkins in 1889 using part of the fortune accumulated by her late husband, Baltimore trader Joseph S. Donovan.

Markets and traders

In their day, slave traders were called everything from ''broker'', the generic term favored in Charleston, to ''nigger-trader'' (sometimes transcribed as ''niggah-tradah''), a term that appears in both slave traders' own descriptions of themselves in oral interviews and in records of African-American folk music of the era. ''Negro trader'', ''negro speculator'', and ''slave dealer'' were common occupational titles that appeared in census records and city directories. Anti-slavery activists called them ''soul drivers''. Slaves sometimes spoke of the ''Georgia-man'' who would take them away to, if not the geographical Georgia, an allegorical "Georgia," elsewhere in the cotton and sugar lands far south from where they were raised.

In the earliest years of the market, "dozens of independent speculators...bought lots of ten or so slaves, generally on credit, in Upper-South states like Virginia and Maryland." In 1836 a Philadelphia paper characterized the work of negro brokers: "They conceive the business of pawn brokers and merchandize brokers. They lend money on the security of slaves, taking the latter as a pledge, to be sold if the pledge be not redeemed. They advance cash on slaves to be sold at auction or private sale, deducting from the proceeds of sale their commission and expenses. They buy and sell slaves upon commission, to suit their customers, and sometimes doubtless, buy and sell free people of color on pretence of their being slaves."

The argument has been made that the domestic slave trade was one that resulted in "superprofits" for traders. But Jonathan Pritchett points to evidence that there were a significant number of firms engaged in the market, a relatively dense concentration of these firms, and low barriers to entry. He says that traders who were exporting slaves from the Upper South were price-taking, profit-maximizers acting in a market that achieved a long-run competitive equilibrium.

Using an admittedly limited set of data from Dunning School historian Ulrich Phillips (includes market data from Richmond, Charleston, mid-Georgia, and Louisiana), Robert Evans Jr. estimates that the average differential between slave prices in the Upper South and Deep South markets from 1830–1835 was $232. In 1876, Tarlton Arterburn told a newspaper reporter that they'd made an average profit of 30 to 40 percent "per head".

Evans suggests that interstate slave traders earned a wage greater than that of an alternative profession in skilled mechanical trades. However, if slave traders possessed skills similar to those used in supervisory mechanics (e.g. skills used by a chief engineer), then slave traders received an income that was not greater than the one they would have received had they entered in an alternative profession. In addition to full-time traders, so-called tavern traders worked on a small scale, especially in the first quarter of the 19th century, examples being the slave auctions held at Garland Burnett's tavern in Baltimore, Washington Robey's slave pen and tavern in Washington, D.C., Turner Brashears of Brashears' Stand along the Natchez Trace, as well as the notorious Patty Cannon ring in Delaware.

Chesapeake cities like Baltimore, Alexandria, Washington, D.C., and Richmond were "slave collecting and resale centers." Major slave-buying markets were located Charleston, Savannah, Memphis, and above all, New Orleans. Economists estimate that more than 135,000 enslaved people were sold in New Orleans between 1804 and 1862. Some traders only bought and sold locally; smaller interstate trading companies would typically have both upper south and lower south locations, for buying and selling, respectively. Larger interstate firms, like Franklin & Armfield, and Bolton, Dickens & Co., might have locations or traders under contract in a dozen cities. Dealers in the upper south worked to collect what they called "shipping lots"—enough people to be worth spending time and money arranging for their transport south. There was a trading season, namely winter and spring, because summer and autumn were planting and harvesting time; farmers and plantation owners generally would not buy or sell until that year's crop was in. The seasonality of the trade is visible in the record books of Missouri trader John R. White, which show that "Over 90 percent of the slaves imported to New Orleans were sold in the six months between November and April."

The notion that slave traders were social outcasts of low reputation, even in the South, was initially promulgated by defensive southerners and later by figures like historian Ulrich B. Phillips. Historian Frederic Bancroft, author of ''Slave-Trading in the Old South'' (1931) found—to the contrary of Phillips' position—that many traders were esteemed members of their communities. Members of the "best families," and a number of leading lights of the early Republic, including Chief Justice John Marshall and seventh President Andrew Jackson, were engaged in slave speculation. Contemporary researcher Steven Deyle argues that the "trader's position in society was not unproblematic and owners who dealt with the trader felt the need to satisfy themselves that they acted honorably," while Michael Tadman contends that "'trader as outcast' operated at the level of propaganda" whereas white slave owners almost universally professed a belief that slaves were not human like them, and thus dismissed the consequences of slave trading as beneath consideration. Similarly, historian Charles Dew read hundreds of letters to slave traders and found virtually zero narrative evidence for guilt, shame, or contrition about the slave trade: "If you begin with the absolute belief in white supremacy—unquestioned white superiority/unquestioned black inferiority—everything falls neatly into place: the African is inferior racial 'stock,' living in sin and ignorance and barbarism and heathenism on the 'Dark Continent' until enslaved...Slavery thus miraculously becomes a form of 'uplift' for this supposedly benighted and brutish race of people. And once notions of white supremacy and black inferiority are in place in the American South, they are passed on from one generation to the next with all the certainty and inevitability of a genetic trait." And yet despite the dehumanizing doctrines of white supremacy that seemingly mandated separatism and black oppression, there is evidence that at least some slave traders were perfectly capable of recognizing enslaved people as human, rather than some form of livestock: a not-insignificant number of white slave traders provided for the families of mixed-raced children they'd formed with women they'd once enslaved. An enslaved woman named Charity Bowery told Lydia Child that she was sold to a trader sometime before 1848 but "Bowery had often served the man oysters from a food stand she operated, even when he was unable to pay. The slave trader remembered her kindness, and after he bought Bowery and several of her children, he set her and one of the children free as recompense." Multiple sources attest that Baltimore slave trader James F. Purvis quit the human-trafficking business and devoted himself to banking and charity projects after a religious conversion, and New Orleans trader Elihu Creswell emancipated his 51 slaves upon his death and even funded their transportation to free states. As historian Deyle put it in ''Carry Me Back'' (2005): "While there is no record of any slave traders feeling guilt over what they did for a living, the actions taken by the New Orleans dealer Elihu Creswell do raise some questions." Abolitionist Lewis Hayden wrote to Harriet Beecher Stowe, "I knew a great many of them, such as Neal, McAnn nowiki/>Neal McCann?">Neal_McCann.html" ;"title="nowiki/>Neal McCann">nowiki/>Neal McCann? David Cobb (slave trader)">Cobb