[pcurve]

Here's a map of Western countries.

https://en.wikipedia.org/wiki/Western_world#/media/File:The_...

[elros]

That's a silly map, given there's no actual authority to define this and the rules are arbitrary.

Here's another map of Western countries: https://upload.wikimedia.org/wikipedia/commons/9/91/The_West...

The definition you're alluding to seems to be widespread within the US, but is by no means the most widespread on a global level.

I think this map is closer to what most people consider western: https://upload.wikimedia.org/wikipedia/commons/8/8d/Westernc...