Why did the tribal community begin to collapse?

A tribal community was the unification of a group of relatives – related by blood ties. These people collectively owned land. But changes are taking place. Copper tools are being used. This made it possible to increase arable land. The clan was growing by this time, and people appeared who were not relatives. And here the clan community is replaced by the neighboring community. At first, several families live side by side and farm collectively. They are only entitled to a portion of the product produced. Their personal property concentrated land for plowing, tools and livestock. But lands (meadows, pastures, water bodies) remained in common use. An excess of the products of labor appears, and the preconditions for the division of labor arise. Inequality gradually arises.