We're going to be the world's leading superpower for a lot longer than anyone thinks. I don't think China any longer has a chance of catching up to the United States as a world superpower, since it appears to be turning into a giant version of 1990s-era Japan. Once you slip into that trap, it is awfully difficult to get out of it, especially given adverse demographics compounded by China's self-inflicted one-child policy.
But unlike Japan, China has a substantially larger population and substantially smaller GDP per capita than the US. China's so far behind the US in GDP per capita, that even in a pessimistic scenario, it still grows faster than the US, doesn't it? So it keeps closing the gap on the US, it's just that it'll take a lot longer to reach parity than previously thought possible.
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