IF THIS WERE 1918, 1935, OR EVEN 1960, the fact that we would be having a discussion about the importance of mayors would seem somewhat irrelevant. Even big city mayors in places like New York, Chicago, Toronto, or Montreal, though they acted tough, were easily overpowered by higher levels of government. Those were the days when societal problems were huge – massive immigration, poverty, corruption, gangs, over crowding – and it was perceived that the big challenges required big governments. That wasn’t an incorrect assessment, as sweeping changes and resources were introduced from senior levels of government that gave the sense that society could overcome anything. There were railroads, an expanding network of airports, revamped harbours, social programs, corporate legislation, and even putting people…