http://en.wikipedia.org/wiki/Fourth_WorldQuote:
The Fourth World refers to
1. sub-populations socially excluded from global society;
2. hunter-gatherer, nomadic, pastoral and some subsistence farming peoples living beyond the modern industrial norm.
3. 4th World can also refer to sub populations, existing in a First World country, with the living standards of those of the Third World, or developing countries.
...Technologically speaking, Castells uses the term "Fourth World" to represent the people in regions that are bypassed by most forms of technology. These people reside both in urban and rural areas, and are viewed as structurally irrelevant in our society as they neither produce nor consume what is considered important in a globalized and technologically connected world.
Also, I'm disappointed Fanta didn't comment on the convo I posted.