New Research

The Fall of the Roman Empire Was Less a Clash of Civilizations and More an Opportunity to Mix and Mingle, a New Genetics Study Shows

Researchers who analyzed genomes from early medieval graves in modern-day Germany hypothesize that people from the former Roman Empire formed families with Germanic people soon after the empire fell

Sonja Anderson | Daily Correspondent

May 8, 2026 11:54 a.m.

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After hundreds of years of colonial dominance in Europe, the western Roman Empire fell in the fifth century C.E., weakened by internal strife and attacking Germanic tribes. The empire’s long reign and dissolution left a massive legacy on Europe’s modern history—including its ancestries.

In a study recently published in the journal Nature, researchers analyzed more than 250 genomes from early medieval graves in what’s now southern Germany. They discovered a family tree of diverse Roman and northern European lines, which they say twisted together around the collapse of Rome to form a new community. The findings contradict a popular narrative that the end of the empire brought only conflict between Romans and northern Europeans.

“Traditionally, the whole story … was seen as a clash of civilizations between Germanic hordes in the north and the Roman Empire in the south,” study co-author Joachim Burger, an anthropologist and a population geneticist at Johannes Gutenberg University Mainz in Germany, tells Scientific American’s Emma Gometz. “It’s actually more a story of peaceful integration.”

The researchers extracted the genomes from row grave cemeteries in German regions located near the Roman Empire’s northern frontier. The graves date to between 400 and 700 C.E., and they belonged to communities of small-scale farmers and livestock-keepers, reports Nature’s Ewen Callaway. According to a statement from the university, the researchers compared these genomes to about 2,900 others: ancient, early medieval and modern samples from northern and southern Germany.

What they found was a community of people of mixed ancestry. Per Nature, the grave genomes suggest that Romans from the south and Germanic peoples from the north began intermarrying immediately after the end of Roman rule, “as social boundaries faded.”

“Crucially, this influx ​was not driven by large, ethnically homogeneous tribal ​blocs or major clans, but rather by ⁠small kinship groups and even isolated individuals,” Burger tells Reuters’ Will Dunham. “This pattern directly contradicts the traditional narrative of a 'mass barbarian invasion' following Rome’s collapse.”

By the fifth century C.E., Roman expansion brought Europe under an “imperial monopoly,” said historian Walter Scheidel, author of Escape from Rome: The Failure of Empire and the Road to Prosperity, in 2019. “The disintegration of the Roman Empire freed Europe from rule by a single power,” and its people “rebuilt society along different lines,” said Scheidel.

So, who were the newly integrated people of the row grave cemeteries? Their households were made up of nuclear families, with monogamous husbands and wives. According to the statement, the community avoided “close kin marriages,” and widows didn’t remarry within their late husband’s families.

“All these traits reflect Christian norms from Late Antiquity,” Burger tells Reuters. By then, the Roman Empire had adopted Christianity as the state religion. The fact that an “early medieval, presumably Germanic society” was performing Roman burial practices shows that “late antiquity isn’t actually finished; it’s just transforming into a new, less urban and more agricultural society,” Burger tells Scientific American.

Researchers estimate that the men buried in the row graves had an average life expectancy of 43 years, while the women lived to about 40. Nearly 10 percent of boys died in infancy or childhood, compared to about 8 percent of girls. Almost a quarter of the children lost at least one parent by the age of 10, but most grew up with grandparents, per the study.

“It was really a tight kin group,” Toomas Kivisild, a geneticist at the Catholic University of Leuven in Belgium who wasn’t involved in the study, tells Scientific American. Post-Roman graves found elsewhere in Europe, like England, don’t compare. “The kinship intensity in those cemeteries is far less intense compared to [these new findings].”

This mingling between Romans and northern Europeans helped form Europe’s current genetic structure, the research shows, with more people arriving from the north and joining the lineage as the centuries passed.

By around the seventh century, a new genetic profile had emerged, Burger tells Reuters: “one that closely resembles the genetic profile we observe today in central Europe.”

Sonja Anderson | Read More

Sonja Anderson is a writer and reporter based in Chicago.