Like a Big Mac or a Coke, a Budweiser is one of the global economy’s more reliable pleasures, cheaply available almost everywhere. Historically, like the double-pattie burger and the iconic cola, the global dominance of light, fizzy, relatively bland, central European-style lager — from Budweiser to Molson and Corona — relied as much on cleanliness and consistency as it did on taste, as anyone who has tasted a Bud can tell you. In a talk to a gastronomy conference at the University of Toronto Mississauga this weekend, food historian Jeffrey Pilcher will argue that lager conquered the world, after first...