What aspects of "the way things have always been done" were left behind during The Great Depression? Are we calling for the return of any of these artifacts of our "golden" past?

How did inca develop their road system? a) they used mortar to hold the stones together. b) they built suspension bridges over rivers. c) they mixed copper and stone together to make the blocks. d) they laid roads in the cities, not in the less densely populated deserts.