Definition - What does Fourth World mean?
The term Fourth World describes those areas of the world with the least economic development and lowest GNP per capita. Unlike the Third world, the Fourth World does not have political relationships with other countries, and its inhabitants live a traditional hunter and gatherer lifestyle.
Safeopedia explains Fourth World
The third world includes many countries with strongly developing economies and rich resources. In order to distinguish these countries from their underdeveloped neighbours, the term Fourth World was coined to describe countries that do not participate in the global economy. The population of Fourth World countries may be fully self- sustaining, but, nevertheless, economic performance is poor. Many Fourth World inhabitants live within the political borders of other first and third world countries, but have different cultures and do not participate in the economy.