Big
I agree . The US cannot be beat "economically, technologically, militarily, and culturally."
The US is a social mess. According to the well researched and analyzed The Spirit Level, the US is tied with Portugal for the worst developed country to live in. Their violence rate is unbeatable in the developed world. They invade small, weak countries, and lose.................technical skill plus over a billion people makes China a prime candidate for leading the world.