 Ramba uchiverenga ndima ino - Kuparara kwezvoupfumi, kuneta nehondo, uye kusagutsikana nehurongwa hwehurumende hwoudzvinyiriri zvakaita kuti pave neRussian Revolution muna 1917. Kuparadzwa kwoumamboPakutanga akaunza mubatanidzwa wemasununguko uye vemasangano evanhu vane mwero, asi mitemo yavo yakakundikana yakatungamirira mukubatwa kwesimba nemaCommunist Bolsheviks musi wa25 October 1917 7 November New Style. Muna 1922, Soviet Russia, pamwe chete neSoviet Ukraine, Soviet Belarus, uye Transcaucasian SFSR yakasaina Chibvumirano cheKuvambwa kweUSSR, ichibatanidza zviri pamutemo nyika dzose ina kuti dziumbe Soviet Union senyika. Pakati pa1922 na1991 nhoroondo yeRussia yakava nhoroondo yeSoviet Union, inobudirira nyika yakavakirwa mune zvematongerwo enyika inenge yakafanana neHumambo hweRussia pamberi pe1918 Chibvumirano cheBrest-Litovsk. Kubvira mumakore aro okutanga, hurumende muSoviet Union yakavakirwa pautongi hwebato rimwe chete hwevaKomonisiti, sezvo vaBolshevik vakazvidaidza, kuvambira muna March 1918. Nzira yekuvaka socialism, zvisinei, yakasiyana panguva dzakasiyana munhoroondo yeSoviet: kubva pahupfumi hwakasanganiswa uye nzanga dzakasiyana uye tsika dzemakore e1920 kuburikidza nehupfumi hwekuraira uye kudzvinyirira kwenguva yaJoseph Stalin kusvika nguva yekumira kubva kuma1960 kusvika kuma1980. Munguva iyi, Soviet Union yakanga iri mumwe wevakundi muHondo Yenyika II pashure pokunge yapora kubva pakupinda kwechimbichimbi kukuru muna 1941 neyaimboshanda nayo muchivande, Nazi Germany. Rakava simba guru rinokwikwidzana nerimwe simba guru idzva United States nedzimwe nyika dzokuMadokero muHondo Yemashoko. USSR yakabudirira nehurongwa hwayo hwomuchadenga, ichitumira satellite yokutanga yokunyepedzera nomunhu wokutanga muchadenga. 