World. Therefore, the United States and the Soviet Union went to great lengths to establish connections in these countries by offering economic and military support to gain strategically located alliances (e.g., the United States in Vietnam or the Soviet Union in Cuba). By the end of the Cold War, many Third World countries had adopted capitalist or communist economic models and continued to receive support from the side they had chosen. Throughout the Cold War and beyond, the countries of the Third World have been the priority recipients of Western foreign aid and the focus of economic development through mainstream theories such as modernization theory and dependency theory. By the end of the 1960s, the idea of the Third World came to represent countries in Africa, Asia, and Latin America that were considered underdeveloped by the West based on a variety of characteristics (low economic development, low life expectancy, high rates of poverty and disease, etc.). These countries became the targets for aid and support from governments, NGOs and individuals from wealthier nations. One popular model, known as Rostow's stages of growth, argued that development took place in 5 stages (Traditional Society; Pre-conditions for Take-off; Take-off; Drive to Maturity; Age of High Mass Consumption). W. W. Rostow argued that Take-off was the critical stage that the Third World was missing or struggling with. Thus, foreign aid was needed to help kick-start industrialization and economic growth in these countries. Perceived "End of the Third World" Since 1990 the term "Third World" has been redefined in many evolving dictionaries in several languages to refer to countries considered to be underdeveloped economically and/or socially. From a "political correctness" standpoint the term "Third World" may be considered outdated, which its concept is mostly a historical term and cannot fully address what means by developing and less-developed countries today. Around the early 1960s, the term "underdeveloped countries" occurred and the Third World serves to be its synonym, but after it has been officially used by politicians, 'underdeveloped countries' is soon been replaced by 'developing' and 'less-developed countries,' because the prior one shows hostility and disrespect, in which the Third World is often characterized with stereotypes. The whole 'Four Worlds' system of classification has also been described as derogatory because the standard mainly focused on each nations' Gross National Product. The general definition of the Third World can be traced back to the history that nations