An important aspect is that the US is that its economies and regional cultures are diverse and dispersed. The US is simply too decentralized to stagnate effecti

An important aspect is that the US is that its economies and regional cultures are diverse and dispersed. The US is simply too decentralized to stagnate effectively. It is not a monoculture in any practical sense which creates a system that can respond quickly to evolutionary pressure. Everything good and bad you hear about the US usually only applies to a subset of the country and often only a handful of cities. There is a high degree of regional specialization in the US as a consequence. No matter what happens in the world, some part of the US is perfectly positioned to take advantage of that. Combine this with general American risk tolerance and business acumen, and you have a country that is unusually organically adaptive to changing global economies.