I think the topic of a declining/slowly collapsing society needs serious research. How do you definitively measure if a society is progressing or regressing? If you measure by infrastructure the US probably hit its peak in the 60s and has been declining since then. https://www.infrastructurereportcard.org/
"Progress" seems subjective and political. I posit no definitive measure of progress exists.
- rate of new miles of roads - rate of increase/decrease in potholes per 10 miles - number of bridges that need fixing - number of people on government assistance - percentage of population in jail - peoples test scores on standardized international tests
its not like things are unmeasureable... just that politics awards those who ignore these things