Anarchism is self govern societies based on voluntaryism. In order to have anarchy or even call yourself an anarchist, the non-violence principle is the most important one. You can not force me to do anything, and I can not force you to do anything. I keep all my money, you keep all your money. However, as long as those principles are respected everyone is free to create or join whatever society they please. If you want communism, dictatorship, capitalist or a primitivist society, you are free to create that community or to live as one. Everyone will be free to join or leave whenever they please.