What earthly govt had (or still have) similarities to life in Oceania? What is their political system?

Oceania is a totalitarian state dominated by the principles of Ingsoc (English Socialism) and ruled by an ominous organization known simply as the Party, of which Big Brother is the figurehead.

Orwell's parallels to totalitarian regimes of the early twentieth century such as Nazi Germany and Stalin's Soviet Union, and the degree of control they maintained over their citizens, are clear.