The majority of the world in uninhabited because it’s uninhabitable. Gee, I wonder why there’s so much unused space in Greenland or the north pole or the Sahara. Oh, wait, I don’t. The first world has an abundance of food because here is where it actually grows and here is where it’s not likely to be looted.

But even if you were correct, our resources are still limited. For socialism to work, you’d need UNlimited resources, which was carnito’s point.