2. The matriarchal clan commune has experienced its heyday, the development of social productive forces is accelerating day by day, and men gradually occupy a dominant position in major production departments such as agriculture, animal husbandry and handicrafts, so the matriarchal system naturally transits to the paternal system. Patriarchal commune gradually formed. Since then, the individual family centered on patriarchy has become a force against the clan, and the primitive society has gradually disintegrated. Relying on economic advantages, men occupy a dominant position in social production and life. They are bound to demand the calculation of lineage and inheritance according to the paternal line, and the matriarchal marriage order has been broken, and the tradition of living from a wife under the original pairing marriage system has been replaced by monogamy. Under monogamy, women's work is confined to the family, mainly housework and family sideline, and women retreat to a subordinate position in the family economy. Initially, this small family was attached to the paternal family. With the further development of production, small families have more independence and autonomy. Clan society is on the verge of disintegration.