When archaeologists uncovered a Neanderthal shoulder blade in a cave in Iraqi Kurdistan, the nearly perfect circular hole they found sparked a fresh debate about how violent our extinct cousins might have been. The bone, part of the famous Shanidar A skeleton, shows a 15 mm perforation that the research team believes was caused by a sharpened wooden spear passing through the chest, lung and major blood vessels before exiting the left shoulder blade. If the spear was indeed the weapon, the injury would be one of the earliest known instances of lethal combat involving a wooden implement.
Analysis
The researchers, led by Dr Emma Pomeroy of Cambridge’s Department of Archaeology, base their interpretation on the shape and angle of the wound. "It is not the kind of break that you would get naturally, because it is so circular," Pomeroy said, noting that experimental reconstructions of wooden spears produce similar round holes in bone. The team also points to the positioning of the injury – a trajectory that would have required the spear to strike the chest before exiting the shoulder – as consistent with a thrust rather than an accidental fall.
Beyond the technical assessment, the find feeds into a growing body of evidence that Neanderthals engaged in violent encounters more often than once thought. Earlier discoveries at the same Shanidar cave revealed a Neanderthal with a partially healed rib injury, likely caused by a stone‑tipped spear. Even older, a 2022 study of Neanderthal skulls from Spain’s “Pit of Bones” documented multiple healed head wounds, suggesting repeated blows over generations. Together, these data points challenge the long‑standing view that organized aggression only emerged with the advent of farming societies.
Prof Chris Stringer of the Natural History Museum, who was not involved in the new study, leans toward an interpersonal‑violence explanation. "The researchers leave it open whether this resulted from a hunting accident or interpersonal violence, but in my view the latter seems more likely, given the positioning and extent of the wound," he told BBC News. If the injury resulted from a conflict between individuals or groups, it would imply that lethal combat was a part of Neanderthal life, not an isolated incident.
Importantly, the authors do not claim that every Neanderthal community was habitually violent. Instead, they suggest that violent episodes—whether hunting mishaps or hostile encounters—were present and perhaps more common than previously recognized. This nuance aligns with broader paleoanthropological trends showing that early humans, including Homo erectus and even earlier hominins, displayed signs of aggression long before permanent settlements existed.
Uncertainty
While the spear‑wound hypothesis is compelling, the evidence remains indirect. The bone itself cannot reveal the exact material of the weapon, and the researchers acknowledge alternative scenarios. A hunting accident—sometimes termed "friendly fire"—could produce a similar injury if a spear missed its intended prey and struck a companion. Moreover, the preservation of wooden artifacts from 75,000 years ago is exceedingly rare, leaving the spear’s existence inferred rather than directly observed.
Another layer of uncertainty lies in the broader inference about "frequent" violence. The Shanidar A specimen adds a single data point to a limited sample of Neanderthal remains. While other sites, such as the Spanish skull assemblage, show multiple injuries, the overall frequency of lethal encounters across the entire species remains unresolved. As Dr Pomeroy notes, "We can't tell for sure whether these Neanderthals were hurt by a companion during a hunt or murdered by a rival," underscoring the need for more contextual evidence.
Future discoveries—particularly those preserving organic weaponry or providing clearer trauma patterns—will be essential for refining our understanding of Neanderthal social dynamics. Until then, the Shanidar shoulder blade stands as a vivid reminder that prehistoric humans, Neanderthals included, lived in a world where the line between survival and conflict could be razor‑thin.
Implications for Modern Perceptions
These findings invite a reassessment of the stereotype of Neanderthals as gentle, brutish, or merely primitive. By highlighting the capacity for sophisticated weapon use and the potential for lethal interpersonal conflict, the research paints a picture of a species capable of both complex social cooperation and violent confrontation—behaviors that echo throughout human evolution. As scholars continue to unearth the physical traces of our ancestors, the narrative of human prehistory becomes increasingly nuanced, reminding us that the roots of violence—and the capacity for peace—run deep in our shared past.