Three-world model

The terms First World, Second World, and Third World were originally used to divide the world's nations into three categories. The complete overthrow of the post–World War II status quo, known as the Cold War, left two (originally three) superpowers (the United States and the Soviet Union) vying for ultimate global supremacy. They created two camps, known as blocs. These blocs formed the basis of the concepts of the First and Second Worlds.[1]

The "Three Worlds" of the Cold War era, April  August 1975
  First World: Western Bloc led by the USA, Japan, United Kingdom and their allies
  Second World: Eastern Bloc led by the USSR, China, and their allies
  Third World: Non-Aligned and neutral countries

Today, the terms first and third worlds are generally used to refer to developed and developing countries.


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