That's where he got his motivation from
adjective
Stalin regarded Churchill's "Iron Curtain" speech as a dangerous move because it signified a clear division between the Western democracies and the Eastern bloc under Soviet influence. He perceived it as an attempt to rally Western powers against the USSR, potentially inciting hostility and undermining the post-war cooperation that had been established. This rhetoric threatened to solidify the ideological conflict between capitalism and communism, escalating tensions during the early Cold War. Stalin feared that such a public declaration could galvanize opposition to Soviet policies and provoke further encirclement by hostile nations.
It was about the evils of Stalin.
Old major represented Karl Marx the creator of communism and his speech represented his publication on communism.
Stalin died in 1953; the Berlin Wall went up in about '60/61.
Barbara Bush
1956
due to his speech and and how he wanted to rule
Josef Stalin was denounced by Nikita Khrushchev in his secret speech upon coming to power following Stalin's death in 1953. He spoke of his desire for "de-stalinisation" and "peaceful co-existence".
Barbara Bush
The dangers of communism in his 'Iron Curtain' speech.
It's a noun - the name of a particular political belief.