From your link.....Marx and his co-worker, Engels, consistently argued that socialism (or communism, they used the terms interchangeably) could only evolve out of the political and economic circumstances created by a fully developed capitalism. In other words, production would have to be expanded within capitalism to a point where the potential existed to allow for "each [to take] according to their needs". In turn, this objective condition would have created the basis for a socialist-conscious majority willing to contribute their physical and mental skills voluntarily in the production and distribution of society's needs.

Hence the quite from Brzezinski

Brzezinski described Marxism as a further vital and creative stage in the maturing of man's universal vision... Tension is unavoidable as man strives to assimilate the new into the framework of the old. But at some point the old framework becomes overloaded. The new input can no longer be redefined into traditional forms, and eventually it asserts itself with compelling force.

I argue a true free market has nothing to do with the state and democracy is anarchy in its purest form.