How Slavery Changed the DNA of African Americans – Pacific Standard

Our genetic make-up is the result of history. Historical events that influenced the patterns of migration and mating among our ancestors are reflected in our DNA — in our genetic relationships with each other and in our genetic risks for disease. This means that, to understand how genes affect our biology, geneticists often find it important to tease out how historical drivers of demographic change shaped present-day genetics.

Understanding the connection between history and DNA is especially important for African Americans, because slavery and discrimination caused profound and relatively rapid demographic change. A new study now offers a very broad look at African-American genetic history and shows how the DNA of present-day African Americans reflects their troubled history.

Slavery and its aftermath had a direct impact on two critical demographic factors that are especially important in genetics: migration and sex. The trans-Atlantic slave trade was a forced migration that carried nearly 400,000 Africans over to the colonies and, later, the United States. Once in North America, African slaves and their descendants mixed with whites of European ancestry, usually because enslaved black women were raped and exploited by white men. And, more recently, what’s known as the Great Migration dramatically re-shaped African-American demographics in the 20th century. Between 1915 and 1970, six million blacks left the South and settled in the Northern, Midwestern, and Western states, in hope of finding opportunities for a better life.

How this turbulent history shaped the genes of African Americans has been unclear because, until recently, most genetic studies have focused either on populations from different geographical regions around the world, or on Americans with European ancestry. Fortunately, African Americans are now being included in these studies on a larger scale, and several long-term studies have collected genetic data on thousands of African Americans, representing all areas of the country. In a recently published study, a team of researchers at McGill University in Montreal turned to this data to take a broad look at the genetic history of African Americans.


The researchers focused on nearly 4,000 African Americans who participated in two important studies, both sponsored by the National Institutes of Health. The Health and Retirement Study consists of older volunteers sampled from urban and rural areas across the U.S., while the Southern Community Cohort Study focuses on African Americans in the South, particularly areas that have a disproportionately high burden of disease. Together, these two studies are among the largest sources of genetic data on African Americans. Importantly, they represent a geographically broad sampling of the African-American population, which is critical for outlining the patterns of genetic history.

The researchers first looked at what fraction of African Americans’ genetic ancestry could be traced back to Africa. Not surprisingly, the data shows that, for most African Americans, the majority of their DNA comes from African ancestors. The results also show that essentially all African Americans have some European ancestry ancestry as well. The genetic mix of African and European DNA, however, follows a striking geographical trend: African Americans living in Southern states have more African DNA (83 percent) than those living in other areas of the country (80 percent). Conversely, African Americans outside the South have a larger fraction of European DNA. Even within the South, this trend holds: Blacks in Florida and South Carolina have more African DNA than those living in Kentucky and Virginia.

One explanation for this geographical bias could be that interracial marriages have been less frequent in Southern states. But this explanation appears to be wrong. The McGill researchers found that most of the European DNA among blacks today probably entered the African-American gene pool long before the Civil War, when the vast majority of blacks in the U.S. were slaves living in the South. The genetic patterns observed by the researchers suggest that, for at least a century before the Civil War, there was ongoing admixture between blacks and whites. After slavery ended, this interracial mixing dropped off steeply.

The implication of these findings won’t be surprising to anyone: Widespread sexual exploitation of slaves before the Civil War strongly influenced the genetic make-up of essentially all African Americans alive today.

But this poses a puzzle: If African Americans can trace most of their European ancestry to an era when America’s black population was overwhelmingly confined to the South, why is it that African Americans now living outside the South have more European DNA?

The researchers propose an interesting answer. They argue that the Great Migration of African Americans out of the South was genetically biased: African Americans with a higher fraction of European ancestry, who often have lighter skin, had better social opportunities and were thus in a better position to migrate to northern and Western states. Though it will take further evidence to show this definitively, the McGill researchers’ results imply that, even after the end of slavery, discrimination that varied with shades of skin color continued to influence the genetic history of African Americans.

Do these genetic findings matter to anyone other than historians and genealogists? The answers is yes — studies of genetic history like this one are important because they help explain why blacks and whites often have different genetic risk factors for the same diseases. African Americans are disproportionately affected by many common diseases, and while much of this is due to poverty and limited access to good health care, genetics plays a role as well. If African Americans are to fully benefit from modern health care, where diagnoses and treatments are increasingly tailored to a patient’s DNA, it is critical that we understand African Americans’ genetic history, and how it contributes to their health today. In other words, we need to understand not just the cultural and economic legacies of slavery and discrimination, but the genetic legacy as well.

How slavery became the building block of the American economy – Baptist &Lockhart -Vox

How slavery became America’s first big business

Historian and author Edward E. Baptist explains how slavery helped the US go from a “colonial economy to the second biggest industrial power in the world.”

The argument has often been used to diminish the scale of slavery, reducing it to a crime committed by a few Southern planters, one that did not touch the rest of the United States. Slavery, the argument goes, was an inefficient system, and the labor of the enslaved was considered less productive than that of a free worker being paid a wage. The use of enslaved labor has been presented as premodern, a practice that had no ties to the capitalism that allowed America to become — and remain — a leading global economy.

But as with so many stories about slavery, this is untrue. Slavery, particularly the cotton slavery that existed from the end of the 18th century to the beginning of the Civil War, was a thoroughly modern business, one that was continuously changing to maximize profits.

To grow the cotton that would clothe the world and fuel global industrialization, thousands of young enslaved men and women — the children of stolen ancestors legally treated as property — were transported from Maryland and Virginia hundreds of miles south, and forcibly retrained to become America’s most efficient laborers. As they were pushed into the expanding territories of Mississippi and Louisiana, sold and bid on at auctions, and resettled onto forced labor camps, they were given a task: to plant and pick thousands of pounds of cotton.

In this 1897 photo, African American men and boys are shown picking cotton on a plantation in Atlanta, Georgia.
 Library of Congress

The bodies of the enslaved served as America’s largest financial asset, and they were forced to maintain America’s most exported commodity. In 60 years, from 1801 to 1862, the amount of cotton picked daily by an enslaved person increased 400 percent. The profits from cotton propelled the US into a position as one of the leading economies in the world, and made the South its most prosperous region. The ownership of enslaved people increased wealth for Southern planters so much that by the dawn of the Civil War, the Mississippi River Valley had more millionaires per capita than any other region.

In recent years, a growing field of scholarship has outlined how America — through the country’s geographic growth after the American Revolution and enslavers’ desire for increased cotton production — created a complex system aimed at monetizing and maximizing the labor of the enslaved. In the cotton fields of the Deep South, this system rested on the continuous threat of violence and a meticulous use of record-keeping. The labor of each person was tracked daily, and those who did not meet their assigned picking goals were beaten. The best workers were beaten as well, the whip and other assaults coercing them into doing even more work in even less time.

As overseers and plantation owners managed a forced-labor system aimed at maximizing efficiency, they interacted with a network of bankers and accountants, and took out lines of credit and mortgages, all to manage America’s empire of cotton. An entire industry, America’s first big business, revolved around slavery.

“The slavery economy of the US South is deeply tied financially to the North, to Britain, to the point that we can say that people who were buying financial products in these other places were in effect owning slaves, and were extracting money from the labor of enslaved people,” says Edward E. Baptist, a historian at Cornell University and the author of The Half Has Never Been Told: Slavery and the Making of American Capitalism.

Baptist’s book came out in 2014, the same year that essays like the Ta-Nehisi Coates’s “The Case for Reparations” and protests like the Ferguson Uprising would call attention to injustices in wealth and policing that continue to affect black communities — injustices that Baptist and other academics see as being closely connected to the deprivations of slavery. As America observes 400 years since the 1619 arrival of enslaved Africans to the colony of Virginia, these deprivations are seeing increased attention — and so are the ways America’s economic empire, built on the backs of the enslaved, connects to the present.

I recently spoke with Baptist about how cotton slavery transformed the American economy, how torture, violence, and family separations were used to maximize profits, and how understanding the economic power of slavery impacts current discussions of reparations. A transcript of our conversation has been edited for length and clarity.

P.R. Lockhart

When you talk about the sort of myth-making that has been used to create specific narratives about slavery, one of the things you focus on most is the relationship between slavery and the American economy. What are some of the myths that get told when it comes to understanding how slavery is tied to American capitalism?

Edward E. Baptist

One of the myths is that slavery was not fuel for the growth of the American economy, that it actually the brakes put on US growth. There’s a story that claims slavery was less efficient, that wage labor and industrial production wasn’t significant for the massive transformation of the US economy that you see between the time of Independence and the time of the Civil War.

And yet that period is when you see the US go from being a colonial, primarily agricultural economy to being the second biggest industrial power in the world — and well on its way to becoming the largest industrial power in the world.

Another myth is that slavery, in and of itself as an economic system, was unchanging. We fetishize machine and machine production and see it as quintessentially modern — the kinds of improvements in production and efficiency that you see from hooking up a cotton spindle to a set of pulleys, which are in turn pulled by a water wheel or steam engine. That’s seen as more efficient than the old way of someone sitting there and doing it by hand.

But you can also get changes in efficiency if you change the pattern of production and you change the incentives of the labor and the labor process itself. And we still make these sorts of changes today in businesses — the kind of transformations that speed up work to a point where we say that it is modern and dynamic. And we see these types of changes in slavery as well, particularly during cotton slavery in the 19th-century US.

The difference, of course, is that this is not the work of wage workers or professional workers. It is the work of enslaved people. And the incentive is not “do this or you’ll get fired” or “you won’t get a raise.” The incentive is that if you don’t do this you’ll get whipped — or worse.

The third myth about this is that there was not a tight relationship between slavery in the South and what was happening in the North and other parts of the modern Western world in the 19th century. It was a very close relationship: Cotton was the No. 1 export from the US, which was largely an export-driven economy as it was modernizing and shifting into industrialization. And the slavery economy of the US South was deeply tied financially to the North, to Britain, to the point that we can say that people who were buying financial products in these other places were in effect owning slaves and were certainly extracting money from the labor of enslaved people.

So those are the three myths: that slavery did not cause in any significant way the development and transformation of the US economy, that slavery was not a modern or dynamic labor system, and that what was happening in the South was a separate thing from the rest of the US. . . .”


Read the full interview here: Source: How slavery became the building block of the American economy – Vox

Overdue reparations is the key to closing the racial wealth gap II Dr. William “Sandy”Darity

Overdue reparations is the key to closing the racial wealth gap

Dr. William Darity‘s congressional testimony lays a path to fix historic inequity that produces unequal outcomes for blacks

Dr. Willliam “Sandy” Darity, Samuel DuBois Cook Center on Social Equity at Duke University.

The case for black reparations must be anchored on three phases of grievous injustice inflicted upon enslaved blacks and their descendants. First is the atrocity of slavery itself.

The case for black reparations must be anchored on three phases of grievous injustice inflicted upon enslaved blacks and their descendants. First is the atrocity of slavery itself. Second are the atrocities exercised during the nearly century-long period of legal segregation in the U.S. (the “Jim Crow” era). Third are the legacy effects of slavery and Jim Crow, compounded by ongoing racism manifest in persistent health disparities, labor market discrimination, mass incarceration, police executions of unarmed blacks (de facto lynchings), black voter suppression, and the general deprivation of equal well-being with all Americans. Therefore, it is a misnomer to refer to “slavery reparations,” since black reparations must encompass the harms imposed throughout American history to the present moment — both slavery and post-slavery, both Jim Crow and post-Jim Crow — on black descendants of American slavery. It is precisely that unique community that should be the recipients of reparations: black American descendants of persons enslaved in the U.S.

Second are the atrocities exercised during the nearly century-long period of legal segregation in the U.S. (the “Jim Crow” era).

In a 2003 article written with Dania Frank Francis, and, more recently, in work written with Kirsten Mullen, we have proposed two criteria for eligibility for black reparations. First, an individual must demonstrate that they have at least one ancestor who was enslaved in the U.S. Second, an individual must demonstrate that for at least 10 years prior to the onset of the reparations program or the formation of the study commission, whichever comes first, they self-identified as black, Negro or African-American. The first criterion will require genealogical documentation — but absolutely no phenotype, ideology or DNA tests. The second criterion will require presentation of a suitable state or federal legal document that the person declared themselves to be black.


… it is a misnomer to refer to “slavery reparations,” since black reparations must encompass the harms imposed throughout American history to the present moment

I also recommend, like the Commission on Wartime Relocation and Internment of Civilians, the commission on reparations proposals commission should be appointed exclusively by the Congress. The commission appointees should be experts in American history, Constitutional law, economics (including stratification economics), political science and sociology. These appointees must have expert knowledge on the history of slavery and Jim Crow, employment discrimination, wealth inequality, health disparities, unequal educational opportunities, criminal justice and mass incarceration, media, political participation and exclusion, and housing inequities. The commission also should include appointees with detailed knowledge about the design and administration of prior reparations programs as guidelines for structuring a comprehensive reparations program for native black Americans.

Where do we go from here?

What would it take to bridge the black-white wealth gap?
A Q & A with Duke University economist William ‘Sandy’ Darity, who has some radical—yet doable—ideas
Reparations well-intentioned, but insufficient for the debt owed
City of Memphis gives $50,000 each to the 14 living black sanitation workers from the 1968 strike
The Loebs : Exploited black labor and inherited white wealth
Penny-pinching Loeb ancestors kept wages flat for 25 years as black laundresses did “miserable” work

Source: Overdue reparations is the key to closing the racial wealth gap