Scientists have been given a rare glimpse into Neolithic social life from a prehistoric cemetery in northern France, where scientists reconstructed a giant family tree that spans seven generations. Experts have used ancient DNA and an archaeological find to reconstruct a detailed family network of 64 people who lived nearly 7,000 years ago.The discovery at the Neolithic site of Gurgy “les Noisats” has added new evidence for how specialists understand some prehistoric cemeteries. Now these places are no longer seen as just burial sites but are understood to be complex and structured archives of human relationships, movement and rules of community.DNA reveals what is invisibleFor Stone Age archaeologists, there has long been a tricky hurdle. Bones and grave goods can tell us about what people ate or the tools they used, but rarely about how people were related. But the opportunity to sample almost an entire burial population opened a new way to understand Gurgy.Researchers analysed genome-wide ancient DNA from 94 individuals buried at the site, according to a 2023 study published in Nature. By combining this genetic information with age, sex and chemical signatures from the teeth, they were able to map out two separate family trees. The larger of the two pedigrees connected 64 people over seven generations, being the largest ancient family network reconstructed from a single cemetery at the time of publication.This scale is very significant. “Sampling of a near complete burial population provides a much stronger basis for archaeologists to interpret prehistoric life,” states a research briefing published in the same journal. Instead of speculating about relationships based on proximity of bodies or the objects they were buried with, the DNA gave an accurate map of kinship that had been invisible for millennia. Stone Age MarriageBut the genetic relationships showed more than just who was related to whom. They also provided surprising insights into the organisation of households and marriages in this ancient community.The family tree, a commentary explains, leads directly to a practice called patrilocality. This meant that when couples married, the men remained in their birth communities while the women left their own families to join their husbands.The soil evidence indicates that the cemetery was bound together by a line of men who lived near home for generations. In contrast, the adult women buried at Gurgy many adult women appear to have come from outside the local community in general, but instead appear to have migrated into the community from elsewhere. This social structure is the reason why the family tree could grow so far in one particular place, making the cemetery a map of ancient migration and residency.A unique community history recordGurgy’s findings fit into a broader pattern found throughout France that Neolithic burial spaces were highly social, selective places, with strict rules.In a burial cavity at the Aven de la Boucle collective burial site in southern France, a close-knit family group used the burial site between 3600 and 2900 BCE, according to a study indexed in PubMed. The study found that independent genomic and radiocarbon evidence converged at the site. Another study from a Neolithic site in Normandy also showed that access to burial sites was highly selective, often depending on particular lineages and male descent.These cases support the idea that prehistoric communities regarded cemeteries as active historical archives. The dead were not buried at random, though. Rather, the privilege of being buried in a family plot was determined by gender, lineage, and community status.Modern archaeology is showing that some of the clearest records of early human society were never written down at all, looking beyond individual skeletons. Instead, they were buried in the ground, waiting for modern science to read them.