Socialism

No, this is wildly incorrect. The Soviet Union had no colonies, nor did it run its economy based on extraction and foreign plundering. It was an economy where public ownership was the principle aspect of the economy, and production was focused primarily on meeting people's needs, which is why life expectancy doubled, literacy rates tripled, homelessness was at or near 0 (outside of critical periods like World War II), education and healthcare were free and high quality, etc.