Why is this even an argument? America.
We perfected the European art of colonializing and terrorizing other ethnic groups, to the point of wiping out an entire continent of people, and enslaving another continent.
We perfected the intellectualism of the Enlightenment, waged ourselves a war against the most tyrannical of the old europeon regime, and created the first proper modern constitution and democracy, inspiring the rest of the world to individual liberation and full representation.
We perfected modern war and globalized economy, and when EU was a wasteland of ash and death, American bombers, soldiers, and credit loans brought Europe back from a complete collapse unlike history has ever known since the end of the western roman empire (the closest Europe has ever been to USA's success)
The brightest minds of each generation have fled Europe since America's birth, creating a unique mix of European ethics, principle, and history, yet not having the ethnically patchworked, war-wrecked, low quality of life Europeon continent to obstruct the progress of a common, united people. If only Europe all spoke one language, or only had one soccer team. Imagine the success you could have.