I hate that book. Seriously. The dominant interpretation now is the right-wing Libertarian one, which says that government programs are always evil and the people who propose them are actively trying to oppress the people, for no other reason than their own savage glee (contrast with, for example, Arendt's Banality of Evil). From this perspective, it was a warning against socio-nationalist policies in Western countries after the War.
In actual fact it, like Animal Farm, was written as an allegory of Soviet government and ideology. English saw the Russians as foreign strangers, so merely writing about Russians as such would have confused people, or resulted in criticism that he didn't know what he was talking about. It was meant to be instructive as to why the USSR would not demilitarize, would not democratize, and that everybody in Russia was okay with this. It predicted (accurately) the need for a perpetual Cold War to occupy industry, and the ideological need to resort to torture and cruel imprisonment to suppress dissent. If you switch the numbers around, "1984" becomes "1948" which is the year all this was taking place.