While it's true that early humans engaged in activities such as cutting down trees and using wood for various purposes, the concept of a "lumberjack" as a specific profession is a relatively modern one. The term "lumberjack" is generally associated with the industrial logging practices that emerged during the 19th and 20th centuries.

During the Neolithic period, which spanned approximately 10,000 to 3,000 BC, humans transitioned from a hunter-gatherer lifestyle to settled agricultural societies. While they used stone tools for cutting and shaping wood, the scale of their woodworking activities was likely much smaller compared to later periods when specialized logging and timber industries developed.

The primary focus of Neolithic societies was on subsistence farming, domesticating plants and animals, and developing permanent settlements. They used wood for building shelters, making tools and weapons, crafting furniture, and for fuel. However, the systematic harvesting of trees for commercial purposes was not prevalent during this period.

It wasn't until the rise of civilizations, particularly in ancient Mesopotamia and Egypt, that large-scale logging operations started to take place. These societies had a greater demand for wood for construction projects, shipbuilding, and other industrial uses, leading to the emergence of specialized workers engaged in felling trees and processing timber.

Therefore, while Neolithic humans certainly used wood for various purposes, the concept of a "lumberjack" as a specialized profession is a more recent development associated with the advancements of industrialization and the rise of modern forestry practices.