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?

Well then to me Marxism is the perfect way to live in a tribal society. But I am having trouble seeing how it could work in a materialistic society.