I have been doing some looking up on Marxism and I think I have come up with an idea of it. Lets say WW3 breaks out and all of society falls. We have to fight for our survival (food, shelter, ect). If a group of people were to work together to survive with each person having a job or jobs to do would that be a Marxist group? There is no money involved and no classes for the people to fall into. Or is that to simple of an explaination?