Without entering (and winning) some kind of major conflict, this was always going to happen.
Two things are important to think about.
1. Power should be measured in relative terms not absolute. (For a good treatise on this, read Paul Kennedy's Rise and Fall of the Great Powers). The US would have to be keeping up with China, India, and rest of world to maintain its previous pole position.
2. Great nations/empires generally become so at least partially through population growth. This can be organic or engineered (ie: continuously conquering more and more territory) but rising dominance almost never coincides with demographic stagnation, which the US is experiencing. This population plateau has been accurately predicted by the US Census for my entire lifetime.
Also nothing about this decline is unusual or unexpected. This is the course of empire, which is not a new concept.
Two things are important to think about.
1. Power should be measured in relative terms not absolute. (For a good treatise on this, read Paul Kennedy's Rise and Fall of the Great Powers). The US would have to be keeping up with China, India, and rest of world to maintain its previous pole position.
2. Great nations/empires generally become so at least partially through population growth. This can be organic or engineered (ie: continuously conquering more and more territory) but rising dominance almost never coincides with demographic stagnation, which the US is experiencing. This population plateau has been accurately predicted by the US Census for my entire lifetime.
Also nothing about this decline is unusual or unexpected. This is the course of empire, which is not a new concept.