"The End of the American Era" was published in 1970:
https://www.amazon.com/End-American-Era-Andrew-Hacker/dp/B00...
There were many other books/articles/documentaries with the same doom-and-gloom published since.
I think most people don't understand America. So maybe an immigrant like me can help: the United States isn't an enduring superpower because it's an eternal and permanent amazing place free of problems. Its unique power of self-healing and course correction, combined with its plentiful resources and human capital, is what makes it great. When everything seems lost, when everybody says "this time is different, it's the big one that will end America", our system finds a way out.
I won't argue about whether the current administration and wars are good or bad. I'll just say that we'll overcome, like we always did, our problems.