THBT it is in the best interest of developing nations to pursue the creation of freely floating currency unions (e.g. ECOWAS) over those which are fixed to a Western Currency (e.g. the CFA Franc)
THBT North American cities with declining populations should embrace a policy of "de-growth" (e.g. repurposing unused infrastructure for other uses, converting unused parking lots to parks) rather than trying to encourage growth (e.g. offering tax breaks to businesses that move to the city)