[muyuu]

Because it's not a per capita thing how large a military you can afford, or how strongly you can lobby.

On a per capita basis the US is world's #10.

The US is the most important country in the world because of its aggregate power, of which the total GDP is an important factor.

[crimsonalucard]

"most important" is kind of arrogant.

[muyuu]

I'm not American though. You can hardly deny it is, or let's say the most relevant.

China is getting there though.