The term "first world" refers to countries that are democracies, which are technologically advanced, and whose citizens have a high standard of living.
The terms First World, Second World, and Third World were used to divide the nations of Earth into three broad categories. The three terms did not arise simultaneously. After World War II, people began to speak of the NATO and Warsaw Pact countries as two major blocs, often using such terms as the "Western Bloc" and the "Eastern Bloc". The two "worlds" were not numbered. It was eventually pointed out that there were a great many countries that fit into neither category, and in 1952 French demographer Alfred Sauvy coined the term "Third World" to describe this latter group; retroactively, the first two groups came to be known as the "First World" and "Second World".

There were a number of countries that did not fit comfortably into this neat definition of partition, including Switzerland, Sweden, and the Republic of Ireland, who chose to be neutral. Finland was under the Soviet Union's sphere of influence but was not communist, nor was it a member of the Warsaw Pact. Yugoslavia adopted a policy of neutrality, and was a founding member of the Non-Aligned Movement. Austria was under the United States' sphere of influence, but in 1955, when the country became a fully independent republic, it did so under the condition that it remain neutral. Turkey and Greece, both of which joined NATO in 1952, were not predominantly in Western Europe. Spain did not join NATO until 1982, towards the end of the Cold War and after the death of the authoritarian dictator Francisco Franco.

In recent years, as many "developing" countries have industrialized, the term Fourth World has been coined to refer to countries that remain predominantly agricultural or nomadic and lack industrial infrastructure. In contrast, countries that were previously considered developing countries and that now have a more developed economy, yet not fully developed, are grouped under the term Newly-industrialized countries or NIC. Some nations have developed their own classification scheme consisting of the "Third World" and the "Two-Thirds World". This system is similar to the former in that it also reflects economic status or behaviour. In terms of material resources, the "Third World" consumes one third, while the "Two-Thirds World" consumes two-thirds of the resources.


High income countries:

While there is no precise definition of the "first" world, the World Bank does categorize countries by income, as high, upper, and lower middle, as well as low income. High income countries are thereby defined as countries with a Gross National Income per capita of US$11,116 or more. According to the World Bank, the following 60 countries were categorized as high income economies as of 2007:

*Andorra
*France
*Netherlands Antilles (Neth.)
*Antigua and Barbuda
*French Polynesia (France)
*New Caledonia
*Aruba (Neth.)
*Germany
*New Zealand
*Australia
*Greece
*Norway
*Austria
*Greenland (Denmark)
*Portugal
*The Bahamas
*Guam (U.S.)
*Puerto Rico (U.S.)
*Bahrain
*Hong Kong (PRC)
*Qatar
*Barbados
*Iceland
*San Marino
*Belgium
*Ireland
*Saudi Arabia
*Bermuda (U.K.)
*Isle of Man
*Singapore
*Brunei Darussalam
*Israel
*Slovenia
*Canada
*Italy
*South Korea
*Cayman Islands (U.K.)
*Japan
*Spain
*Channel Islands (U.K.)
*Kuwait
*Sweden
*Cyprus
*Liechtenstein
*Switzerland
*Czech Republic
*Luxembourg
*Trinidad and Tobago
*Denmark
*Macao (PRC)
*United Arab Emirates
*Estonia
*Malta
*United Kingdom
*Faroe Islands (Denmark)
*Monaco
*United States
*Finland
*Netherlands
*Virgin Islands (U.S.)


IMF advanced economy list:

According to the International Monetary Fund the following 32 countries are classified as "advanced economies:"

*Australia
*Iceland
*San Marino
*Austria
*Ireland
*Singapore
*Belgium
*Israel
*Slovenia
*Canada
*Italy
*South Korea
*Cyprus
*Japan
*Spain
*Denmark
*Luxembourg
*Sweden
*Finland
*Malta
*Switzerland
*France
*Netherlands
*Taiwan
*Germany
*New Zealand
*United Kingdom
*Greece
*Norway
*United States
*Hong Kong
*Portugal