fair enough, but among the movement between around 1970-2020 -- what were the top 3 factors in degradation of communities? would facebook be in the top 3?
I don't understand why that matters. We can't act in 1970. We can act today. So we should be looking at biggest current problems and the highest-ROI fixes.
taking action requires understanding the leading factors that lead to the decline. If you only see one train car , you won't know that the engine needs to be alerted to stop 2 miles down the track.