Well yes, First (Cold War era capitalists), Second (Communist, Marxist, and Maoist nations), and Third World (non-aligned and all the rest of them) are all clearly defined.

Western is more nebulous, which is why I like to push back at it. Each person’s idea of “Western” tends to be a little different.

If we’re taking the cultural root then Brazil, Israel and Lebanon make a nice test cases.

Edit: oh, you’re making the case that Western = First World Nations. That’s a fair and valid short cut, with Japan/South Korea/RoC, and various oost-Communist states in Europe.