Answer:
Communism has been successful in the eyes of working class and poor people. But not if the eyes of rich people. A lot of communist countries have been successful. Although it has been successful, a few factors have made it especially hard for communism to reach its full potential. Communism is international. Without a majority of the worlds economy based on "people over profit" as socialism tries to do. So, yes. Communism is successful but it has a few flaws.