What underlying justification does Stalin use in this document to legitimize Soviet policies?

The Soviet state is built on the resilience and sacrifice of its people. Our struggle against the fascist invaders hardened our resolve and defined the will of the proletariat. We now stand at the threshold of a new world, where the socialist system will triumph. The West, with its decadent capitalist practices, seeks to undermine our progress. In my view, only through unity under communist principles can we ensure true equality and justice for all. Let this document be a testament to the power of the Soviet spirit, unyielding in the face of imperialist aggression. — Joseph Stalin, Address to the Soviet People, July 5, 1945