I’d say the USSR and other non-capitalist systems completely blows up your theory. They were more than happy to violate human rights in the goal of “the greater good”. Communist systems are actually fantastic examples that it is human nature.
There is one small but fundamental problem with your example: USSR was a state capitalism and not a socialist "state". Lenin expected a socialist revolution in Germany while it failed. It failed and freikorps killed Rosa Luxemburg and Karl Liebknecht. For sure you cannot have a socialism in s backward country like Russia. Socialism, in Marxism-Leninism, as a science, is the dialectical negation of capitalism.