https://en.m.wikipedia.org/wiki/Manifest_destiny
Just ignoring the concept of neocolonialism for a second, most American land was stolen through conquest. That the American Empire is not currently aggressively expanding is irrelevant, did Rome not count as an empire when its borders were stable?
1 point
That would be interesting, to compare the land mass of the US with the max size of the Roman empire. My guess is that the romans would win by a hair.
But the Brits would definitely win because they have Australia, which is almost as big as the continental US just in itself, let alone all the other countries they conquered.
