Following the Civil War, the USSR was formally established.
Stalin favoured a centralised approach which would have asserted Russian control across the new state.
Lenin disagreed and favoured a union of autonomous Soviet Socialist Republics who had "voluntarily" chosen to become part of the new USSR.
The reality of the new state was that the USSR was dominant in its size, economy and power.
The Communist parties in each of the SSRs were subservient to the Russian Communist Party in Moscow.
The tolerant cultural and political atmosphere of the NEP period extended to the Jewish population.
During the NEP period, the rights of Soviet Jews were protected and a "national homeland" was created in the far east of Russia where Jews would be free to maintain their cultural heritage.
All anti-Semitic laws were abolished and Yiddish was accepted as a language.