Well there was Chile pre- Pinochet under President Allende. Despite being popularly elected and accending to power bloodlessly, we backed a fascist military dictator (Pinochet) to get him out of office just becaus ehe was communist. Aleende fixed many problems for the vast majority of the poor without entirely eliminating the upper class. Yes, he took many of their assets away to redistribute them but he didnt take it all. His redistribution put the wealthy where they would have been is he had placed socialist income taxes in rhetroactively. Incidentally, he di this with the consent and approval of parliament, which was still popularly voted for and included many upper class, wealthy citizens.
Nevertheless, as beautiful as the Marxist Ideal of communism is, communism fails. Allende was the ONLY leader to date to have done communism on a large scale with a big nation and had it work without having to resort to dictatorial powers the way china and cuba did. (not thet neither china nor cuba really true communisms any more, as cuba is giving citizens privatized farms and china has been a quazi-capitalist 1 party oligarchy for atleast 30 years.)
to be sure, >>21 pointed it out. Survivalism is a viable option. Form comunes and micronations and act autonomously as small countries. hell, if you have the resources and the number, you can, legally succede. assuming you have enough people for industry and you can make trade agreements, you could get official recognition from another nation.