Yeah, the one that begun with bloodbath of the Civil War, purges, forced collectivization, continued through disastrous wars and GULAGs only to die 80 years later with social degeneration of unprecedented levels. That one USSR, yes.

This is something a lot of people forget: Russia before the revolution was not a modern, industrialised nation, it was a country still half stuck in the middle ages. I don't want to defend the atrocities and oppression of the Soviet system, but it has been very effective at industrialising a backwards peasant country.

(In fact, Marx considered Russia the least likely candidate for a communist revolution; it would start in England or Germany.)