Yes. History is filled with empires that have fallen.

Still some value in trying to figure out 'why'. Treat History as a science and ask what are the overall patterns, is there something we can distill out to help guide the future.

US is at the top right 'now'. Wouldn't it be great to prevent the decline that history would say is on the way.

Read some Peter Turchin, he has some good analysis. Patterns in past cycles of growing, then falling, empires.