Clan society is the basic social unit formed by blood relationship, and it is also the basic unit of social economy, also known as clan commune. It's a blood bond. A clan has more than a dozen people, who are descendants of a common ancestor. This is the advanced stage of primitive society. They live together, use public tools, work together and distribute food together. There is no distinction between rich and poor. It was produced in the late Paleolithic period, and intermarriage was possible between clans, which basically ran through the Neolithic period.
In the early days of clan society, matriarchal blood relationship, that is, matriarchal system, was called matriarchal clan society. At the end of the Neolithic Age, it gradually transformed into a patriarchal society with paternal blood as the link.
The clan system is the first formal social organization form of human beings, and the clan is transformed from the group of apes. However, the human clan is different from the group of apes and is relatively fixed. Clans are social groups United according to the kinship of the same ancestor. They are the basic units of primitive social and economic organizations. Several clans with common blood relationship often unite into a big clan, the so-called phratry, and several big clans often unite into a tribe, which constitutes the so-called clan system.