The "Fourth World" comprises nations forcefully incorporated into states, which maintain a distinct political culture but are internationally unrecognized. A convenient shorthand for the Fourth World would be internationally unrecognized nations. These are the 5,000 to 6000 nations representing a third of the world's population whose descendants maintain a distinct political culture within the states which claim their territories. In all cases the Fourth World nation is engaged in a struggle to maintain or gain some degree of sovereignty over their national homeland.