Countries rise as strong people work hard, live with character, and build community. These countries fall as weak people reject hard work and live off the wealth created by their parents, grandparents, and great-grandparents.
Here is a short video narrated by Ray Dalio that describes the process and shows us where the US stands in the process. Sad to say, Ray believes the US is on the way down. Given political division and the fragility of many, but not all, young people, it is hard to argue with his analysis.