Err, no, it’s a failed and discredited political and economic system based on false premises.
As for Cuba and North Korea, Cuba - 1959 revolution (not initially communist), NK 1948.[/quote]
North Korea was provoked by the Soviets northly to convert to what they called “wonderful and peace” world of the communist society 1948 right, so what eventually changed the Cubans from 1959 onwards to be communist?, was it the Soviets or the Chinese intentually?[/quote]
Read up on the Cuban Revolution (wikipedia for a start). That will tell you all you need to know. (basically revolution ousted Batista, a few years later, castro declared that the revolution was socialist, a few years after that he declared it communist).
Basically, around that time if your government came out as communist, the russkies would shower you with money, military equipment, and advisors as well as an off-the-shelf system of internal repression.