The concept of "Third World" was coined during the Cold War era to refer to countries that were not aligned with either the United States or the Soviet Union. Trinidad and Tobago was never part of the Soviet Union and was actually a member of the British Commonwealth. Trinidad and Tobago gained its independence in 1962 and joined the United Nations in 1962.
Today, Trinidad and Tobago is a member of the United Nations and other international organizations, and is considered a developing country. It has a relatively high standard of living and a stable democratic government.