Here are a few alternatives for you: * Developing World ( still patronizing, but a better alternative) * Majority World ( yea, actually the US and Western Europe are just a small fraction of the global population) * Middle-Income Economies * Southern Hemisphere(I see you, Australia!) * etc.
Please, anything but the 3rd World...
https://en.wikipedia.org/wiki/First_World
https://en.wikipedia.org/wiki/Second_World
https://en.wikipedia.org/wiki/Third_World
(You could still view it as obsolete following the end of the Cold War... just more recently obsolete.)
Being in the "third world" simply means your country elected to not join NATO or the Warsaw Pact, and as a result did not receive the economic stimulus of the Cold War buildup.