I am not sure whether you are parodying a common attitude or are being serious, but do you think that the US attitude toward the rest of the world has been symm

I am not sure whether you are parodying a common attitude or are being serious, but do you think that the US attitude toward the rest of the world has been symmetrical ? Morality, "fairness", plays little role - what matters is the power balance. For example, the US (rightly) worry about Chinese military expenditures, especially for blue water navy (which is generally considered the biggest advantage of US army from a geopolitical POV). But right now, the US have more capacity than all the other "power" with blue water capability altogether (Russia, France, UK) and more. 40 % os all the money spent in defense by gvts is spent by the US. What's symmetrical about it ? Note that I am not making a judgement, but those are hard facts that nobody can argue with, whatever their opinion is on the matter. Outside the US, analysts generally refer to a "rebalance" of powers. That China will reach US-level GDP and above is almost certain - but there is nothing that exceptional about is when you have 4 times more people. China with a GDP/habitant ~ western levels would be incredible, though. Although I am confident I will see China becoming the first power in term of GDP, I would be ready to bet that I won't see GDP/habitant rise at the same level as its western counterparts. Making projections in 40 years sounds dangerous anyway - I don't know what the future holds, but I am sure it won't be the people predict.