The USA is a Universal Nation, a country that draws people from all parts of the world - people of all colors, creeds and religions and finds a way to live togather and harness their talent and build a kind of universal dream.
North America is a young sparsely populated continent where people from all over the world go to to make easy wealth by exploiting abundant resources that have been untouched by man for the thousands of years we have existed.
By gathering the best and the brightst,, Americans and those that imigrate accomplishments astound the world in the areas of space, science, military, and medicine. More people have come to the USA from other countries and been awarded more nobel prizes then they have been award to their home countries. Examples only one Indian has been awarded a nobel prizes for science in India but six have been awarded nobel prizes for science in the USA. No Chinese has ever been awarded a Nobel Prize for Science in China but eight Chinese have been awarded Nobel Prize for Science in the USA.
American immigration policies since the first world war has been designed to favour
a) White Europeans, irrespective of their skills/education/background
b) Unskilled, uneducated labour from Latin America/Mexico (suddenly this is changing due to oversupply of labour)
c) Skilled and highly educated people from the rest of the world.
Your observations are the effects of these causal relationships.
the average IQ of an Indian in India is 81, the average I Q of an Indian emigrant to the USA is 115.
You should be far more worried about the fact that the average IQ of a white american is far lower than the average IQ of Indian in the US. You should also be worried about the fact that the average household income of white, black or any other race is far lower than the average household income of Indian Americans.
Overall, you are setting yourself up for a big fall with your stupid theories concerning American pre-eminance. But I would put it beyond an average american to comprehend the pace of change. White Americans are lucky they discovered an empty continent to exploit else you would be still cannibalizing each other in Europe which would be in perennial dark ages. Either way it wont last forever.
Here is some more math. Divide the Nobels that Indians and chinese got against their respective american populations. then do the same with white americans. you will notice which race is the dullest of the three.