What inspired George Orwell to write 1984

Orwell was influenced and inspired by totalitarian regimes of the time, including Hitler's Nazi Germany and Stalin's Soviet Union. Both regimes glorified their respective leaders as demi-gods and saviors, required the destruction of all individuality in order to promote the Party's needs over the individual's, demanded absolute loyalty from their citizens, and resorted to violence whenever disloyalty was suspected. Moreover, both regimes consistently demonized their enemies, just as the Party and Big Brother do in 1984, through the Two Minutes Hate, Hate Week, and daily mass propaganda. Other parallels include the Thought Police as a reinvention of the Gestapo, NKVD (People's Comissariat for Internal Affairs), which orchestrated large scale purges and terror, and the Spies and Youth League as a reinvention of the Hitler Youth and the Little Octoberists, which indoctrinated young people to the Party and encouraged them to report disloyalty observed in their elders, even among family members.