The book highlights the historical process of the formation of a primitive communal socio-economic formation, its decomposition and the formation of classes and class relations. The development of the economy and social system among the Thracian, Slavic and other tribes, the socio-economic and political history of the Old Russian population and Volokhs, the formation of the Moldavian nationality in the Dniester-Carpathian lands are shown. The emergence and development of feudal relations is disclosed, the formation of the Moldavian feudal state, the territorial formation of which ends by the end of the XIV century.