Empty landmass isn’t the only important thing.

I.e. Florida, the third most populous US state (21M), is about half the size of the whole of Germany.

But Germany’s most populous state (North Rhine - Westphalia / NRW) has a pop of 18M.

It’s waaaaay smaller, but the n of inhabitants is comparable.

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To the point: I don’t think , it’s necessary to know the names of foreign states. But it’s good to know roughly what’s going on in the world. It is no secret, that US Americans are exceptionally caught in their own bubble.