I disagree with this on two major points:
I don't think that social evolution is an individual journey for countries. England as a nation might have a founding date around 927 though there have been some pretty major upheavals since then - it isn't fair to measure modern day America a success by comparing it to 1120 England - I think that as a global community all but the newest countries are on mostly even footing with those more aged and ancient countries being at someone of a disadvantage due to having much less solid bases in their constitutions/founding documents - more recent organized countries have been able to learn from history and create founding documents that allow them to have a more stable society... though many of those are in extremely volatile areas of the world.
Canada is like a hundred years younger than the US and doing a fair bit better and Australia founded a mere twelve years after the US is clearly within the peer range and is pretty close to the top of that list with New Zealand (founded slightly more recently than that in 1840 which puts it closer to US unification following the civil war) is usually really close to the top of most of these rankings.
Additionally, I'm not certain the validity of some of the points mentioned above:
In terms of the US's journey it gets the advantage of geography and the same advantage Canada and New Zealand received - it wasn't a theater of war during WWI & WWII, Australia actually suffered catastrophically during WWI with massive numbers of casualties received when participating in the Asia Minor theater (Gallipoli is part of the Australian cultural memory) and in WWII Papau New Guinea was a territory (albeit a relatively autonomous one) of Australia and was a heavily contested theater.
In terms of economy, the USA wasn't a cotton churning backwater on founding, it had a strong plantation based economy but as the world industrialized so did America. Britain & Germany definitely take the cake in terms of the most extreme economic transformations but America was on the upper end of the curve - it did quite well in industrialization building a strong power that it transformed into global power as the other colonial powers collapsed.
Lastly, I don't know if the US really is the pre-eminent power of the globe - certainly in terms of military it's on the top of the pile... but economically - dutch and british service industries move a lot of money around and, the ordering you didn't mention, quality of life for the citizenry, is one category America is really hurting in at this point with endemic obesity, poor healthcare and extremely poor education.