Kinda? Socialism was initially described as a transitionary stage of Communism in the same way as totalitarian violent revolution was described as a transitionary stage of Communism. This view also contained the belief that Capitalism is simply a transitionary stage of Fascism. A mixed market economy then with Socialism and Capitalism then describes an economy that is in a superposition of transitioning to both Communism and Fascism. In reality the transitionary times if you call them that are just as validly real times that people live in and regimes change and come and go and we must strive to fight for justice, equity and self determination while preventing too much power from falling into the hands of too few now and try to find the best system for now rather than acting as though everything is an inevitable slope to one extreme destination and that nothing else matters.