It is the year 2028. The zombie apocalypse has finally occurred, and the world is in anarchy. There are no more governments, no more countries. A brave band of students, teachers, and parents from I. C. have managed to survive and now live in a fortified, zombie-proof compound in the wilderness. These survivors have created a community that is totally self-sufficient. This community produces only what it needs. There is no money. When someone needs something that they can’t make on their own, they simply barter for it. Other things are just shared by all. What kind of economy does this most sound like?