When we look back on the late-19th/early-20th century and think of the technological changes that made life “modern,” we usually imagine the conquests of distance: telegraphs and telephones, trains and steamships, automobiles and airplanes. We don’t think about canned goods, cigarettes, soda pop, phonographs, or Kodak cameras. These things might have been new. They might have been ingenious. But they don’t strike us as especially world-shaking.