The Mousterian tool tradition represents a significant technological and cultural phase during the Middle Paleolithic period, roughly spanning from 300,000 to 30,000 years ago. It is primarily associated with Neanderthals, although some early anatomically modern humans also produced Mousterian-like tools.

The hallmark of the Mousterian tool tradition is the Levallois technique, a sophisticated prepared-core method. Instead of simply striking flakes from a core, the core was carefully shaped and prepared to control the size and form of the flake that would be detached. This allowed for the production of more standardized, efficient, and versatile tools. The flakes were then often retouched to create a variety of specialized tools, including side scrapers, points, denticulates (tools with serrated edges), and notches. These tools were likely used for a range of tasks such as butchering animals, scraping hides, woodworking, and possibly even hafting onto spears.

Mousterian culture extends beyond just tool technology, revealing a more complex behavioral repertoire than earlier hominins. Evidence suggests that Neanderthals were skilled hunters, capable of taking down large game, indicating cooperative hunting strategies. They occupied caves and rock shelters, and there is some evidence for the construction of rudimentary shelters. Perhaps one of the most debated aspects of Mousterian culture is the practice of intentional burial of the dead. While the presence of grave goods is often contested, the deliberate placement of bodies in graves suggests a degree of symbolic thought, care for the deceased, or perhaps early forms of ritual. Furthermore, there is limited evidence for the use of pigments, personal ornaments, and the care of the infirm, indicating social cohesion and compassion within their groups.

The primary makers of the Mousterian tools and culture were Homo neanderthalensis. Neanderthals were robust hominins, well-adapted to the cold, glacial environments of Eurasia. They possessed large brains, comparable in size to or even larger than modern humans. Their cultural achievements, as evidenced by the Mousterian tradition, demonstrate significant cognitive abilities, adaptability, and complex social behaviors, marking a crucial stage in human evolutionary history before the widespread emergence of anatomically modern humans.