Communism as envisioned by Marx and Engels has never existed and never will exist; their belief that a new world order would be created through the State in which the proletariat would rise up and thereby eliminate or eviscerate the capitalists, private property holders, and previous inheritors of wealth, has never occurred, and will never occur. Marx and Engels seemed incapable of comprehending that the new State that they urged the creation of could only be created by force and that this new State power and wealth would come by the forceful takings of the former capitalist's money and their private property, now placed under State aegis. As for the former capitalistic exploitation of labor, this would continue as the same as it ever was, with the difference being that the exploitation of such would now go directly to the State and its beneficiaries.
Communism, far from uplifting the proletariat, would use their newfound wealth and power taken from those that use to have it, to bend society to the dictates of the State, which would or would not have some features of communism, depending upon those that were in power. In any event, State power and State control of all apparatus, including especially the media, justice, and productivity, would allow the State to dictate to the people the propaganda that all was well, when, of course, all was not well at all.
What makes communism such a galling and annoying system of governance is the fact that when the people own nothing, except in common, whatever that is supposed to mean, then they are subservient to the State, and are in essence living in a serfdom/feudalism paradigm, hardly revolutionary in any way. When bad governments, and abusive power, create the conditions for revolution and change, the people, especially the proletariat will never be secure, will never be free, and will never have self determination, in any form of government that in its inception, aggrandizes unto itself all power and wealth, whether this is expressly stated or implied.
For those that profess that they desire to live in a world that is far more equal in opportunity, in fairness, in justice, in income, in brotherhood, and to see far less exploitation of others, this can only exist in a society that recognizes the inherent sovereignty of the individual and that thereby each individual is created equally and has specific inalienable rights. Only when mankind recognizes that a person's rights come from God, and not by arbitrary State fiat, will they ever have a chance to create a government that supports and benefits these rights and that government in order to be legitimate is created specifically to secure those rights.
Far from it, America as a nation, was not founded as a capitalistic country as that was not its purpose in its declaration, its purpose was to break forever free from the mistaken notion of the Divine right of Kings, and to replace that with the knowledge that each of us is an equal child of the most High God. Man's inhumanity to man has led us to terrible poverty, injustice, and inequality; unfortunately, communism is in actuality never the rise of the poor and oppressed to their rightful place at the table of fairness, but instead merely a changing of the guard and semantics for the betterment of those that have no soul to conquer those that do.