Intellectually speaking, they're well past it. Perhaps there's a lot of vibrant thought going on that isn't appearing in English, but across the continent, it seems like the major new and vibrant intellectual currents are just futile gasps of neo-reaction. Houellebecq is the most famous French intellectual today, and if you read his article linked above, it's pathetic. Thinly-veiled butthurt at America and a bunch of whinging on about fighting globalization and reviving tradition.>>14993
Even if the country dissolves, the people and the culture of the present-day United States will endure. Mexicans intermarry and assimilate, and there isn't a globally resurgent meta-identity that they're prone to slot themselves into instead of an American one. Immigration causes problems here, but not existential ones. We already swamped our native-born population once over with cultural aliens, and we can do it again.
Meanwhile in Europe, you have miserable birth rates almost everywhere, and a bunch of immigrants who are as attracted to the idea of Islam as they are to the idea of European culture. And in the countries where they don't have to worry about Islam, the birth rates are even lower, and a good portion of the young people leave home for rich Western European countries.
Of course things could turn out different, but looking at Europe now, it looks like the rich countries are going to be largely Islamized, and the east is simply going to be dead. The rich countries are also seeing the gradual decline of the welfare state and the rise of inequality, which were previously the only two areas where the continent had a significant advantage over the US.
The US is declining, but Europe is going down much faster.