Quora Answer: Why is Singapore Not Classified as a First World Nation?

The following is my answer to a Quora question: “Why is Singapore Not Classified as a First World Nation?” 

Singapore was not a First World nation because it did not explicitly side with the US, NATO, and their allies, against the Soviet Union, Warsaw Pact and their allies, the Second World; during the Cold War.  As a member of ASEAN, and the Non-Aligned Movement, Singapore was Third World.  Those terms are outdated since the Cold War is over.  Singapore is, however, a developed country.