Best/Worst
Third World Countries 2026
Total Count
69
Total number of countries commonly classified as third world based on economic development indicators.
Human Development Index
0.35
0.4
0.45
0.5
0.55
0.6
0.65
0.7
Third World Countries
- The term “Third World” is considered slightly outdated in modern contexts. In its original meaning, “Third World” referred to countries that were not aligned with the Cold War power blocs - ie. the USA and the USSR.
- Sauvy first coined the term in 1953 in this context. Mao Zedong of China later used the terms in his ‘Three Worlds’ theory, with a similar structure but different parameters.
- See also: Developing Countries, Global South Countries
Key Findings
What Is a Third World Country?
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A 'Third World country' is an outdated term now commonly used to describe economically developing or low-income nations with lower standards of living and limited industrialization.
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During the Cold War, 'Third World' referred to politically non-aligned countries. After the Soviet Union's collapse, the term shifted to describe economic development status.
Modern Classification
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Today, terms like 'developing countries' and 'low-income countries' are preferred over 'Third World.'
-
Countries are now classified using the UN Human Development Index (HDI), where scores below 0.70 indicate lower development.
Definitions & Methodology
Alternatives to 'Third World' Modern terms such as 'developing countries,' 'least developed countries,' and 'low-income countries' are now preferred. These classifications are based on measurable indicators like income levels, economic structure, and development outcomes.
How Countries Are Classified Today Countries are now classified using indices such as the UN Human Development Index (HDI), where scores below about 0.70 indicate lower development, and World Bank income categories that group nations by gross national income per capita.
Last Updated: May 14, 2026
Sources
- Cold War Alliances 1975 - Wiki
- B. R. Tomlinson, 'What Was the Third World?' - Journal of Contemporary History, 38.2 (2003), pp.307-321.
- Cold War Map 1953 - Wiki
- Three Worlds Theory - Wiki
- Least Developed Country List - United Nations
- Least Developed Countries - United Nations
- UN Human Development Data - United Nations
- List of Least Developed Countries - 2021-02 - United Nations
- Countries of the Third World - NationsOnline
- Least Developed Countries - Wiki
