1963, from Fr. tiers monde, formulated 1952 by A. Sauvy on model of the third estate (Fr. tiers �tat) of Revolutionary France. His first world is the West, and second world
is not the East bloc but the Soviet bloc.
http://www.etymonline.com/index.php?term=Third +World
Originally the Third World was contrasted with the First World, the capitalist industrial nations, and the Second World, the industrialized Communist nations.
http://encarta.msn.com/encnet/features/diction ary/DictionaryResults.aspx?refid=1861719773
There is another word Fourth World - the world's most poverty-stricken nations, esp. in Africa and Asia, marked by very low GNP per capita and great dependence upon foreign economic aid.
http://www.infoplease.com/ipd/A0447789.html
The term Fourth World refers to a "lost" world or sub-population subjected to social exclusion in global society. Sociologist Manuel Castells originally coined the term.
Fourth World follows the progression First World, Second World and Third World, which forms a distinct hierarchy of categories for nation-state status. However, unlike these categories Fourth World denotes nations without states.
http://en.wikipedia.org/wiki/Fourth_World
http://encarta.msn.com/encnet/features/diction ary/DictionaryResults.aspx?refid=1861690725
The countries of th