Willow Run :
the constellation of international and intergovernmental organizations poured out forecasts of doubling of traffic over such-and-such number of near-future years?
Oh yes but you forgot the most important influencers : Boeing and Airbus , whose very similar forecast the last 10-15 years spread the word. Everyone else, including Airports and ATC took those numbers for granted and reproduced them in their own forecast ...and planned their infrastructure and staff on those numbers ..Except those numbers were only based on airlines expansion plans. Vicious circles feeding one another.