We are the only nation among the "developed nations" to still start wars, continue the death penalty, not provide public health or decent educational opportunities for those capable of taking advantage of them. Large numbers of our citizenry are illiterate, ignorant and mired in primitive, superstitious religion. Large numbers of our population live lives of poverty and chronic unemployment, in lawless, urban wastelands. We haven't had a positive trade balance in half a century and don't produce anything that is competitive on the World market.
Why would anybody in the World that aren't themselves in dire straits, look to us for leadership or think we could have anything to offer them?