The origin of the family, private property, and the state, in the light of the researches of Lewis H. Morgan 2026-02-16T02:34:29+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Engels, Friedrich, 1820-1895 (Progress, 1968)