Understanding why communism collapsed says a great deal about political dynamics. Post communist countries are still very much affected by their communist experience. We can see how difficult it is to create a democratic, market system. Political instability and economic corruption are very real possibilities. Back-sliding is possible B. Theory of Comunism 1.
Societies progress as they move from station to station, towards communism.
Progress is invitable and only in one direction, although the time to go from station to station and the time at each station is not fixed or certain. History is pushed by class conflict and contradictions at each stage. Lenin - Leninism History moves through voluntarism, i.e. people voluntarily make choices to push history forward. After the revolution, the party will provide leadership and control the government.