I disagree completely. Implementing socialism in disenfranchised states is by far a more streamlined process than implementing any brand of capitalism. What killed "hundreds of millions of people" was the coupling of fragile citizenries with malicious and self-serving leaders, not the establishment of socialism. I see correlation, but no causation, and I find hasty dismissal of socialism as the "disproved and damned" counterpart of capitalism as completely flawed--especially in a society where the two have been working together (I'd say successfully) for quite some time.