Mysterious Collapse Reshaped Europe 5,000 Years Ago, Scientists Say

Key Points:

• Analysis of ancient DNA from 132 individuals in a French tomb reveals a clear genetic break between populations before and after the Neolithic decline around 3000 BCE, indicating a major demographic disruption.
• The earlier population showed signs of high mortality, especially among the young, suggesting a catastrophic event such as disease, famine, or conflict, while the later population had genetic ties to southern France and Iberia, indicating migration and resettlement.
• Pathogenic DNA, including Yersinia pestis and Borrelia recurrentis, was found in remains from the first burial phase, implying infectious diseases contributed to population stress, although no single cause explains the decline.
• Environmental data shows forest regrowth during this period, consistent with reduced human activity, and social patterns shifted from close-knit family groups to looser, more dispersed relationships after the decline.
• The findings suggest a complex interplay of multiple pressures leading to population collapse and replacement, reflecting broader widespread disruptions across Neolithic Europe rather than a single catastrophic event.