South Korea isn't, but Switzerland and Sweden, by virtue of being neutral is a third world country in the original defintion: https://en.wikipedia.org/wiki/First_World
Because it wasn't an economic criteria, you've also got countries like Angola in the First World by the original defintion.
> Because it wasn't an economic criteria, you've also got countries like Angola in the First World by the original defintion.
No, you didn't. Angola was never both a country and part of the First World (Portugal was part of the First World when the term was coined, and Angola was part of Portugal then; when Angola became independent, the regime was Cuban-backed and Soviet-allied, and thus it was part of the Second World.)
Because it wasn't an economic criteria, you've also got countries like Angola in the First World by the original defintion.