What finally got them to change? Business, profit, and marketing, of course. In the mid-twentieth century, Kodak, the film and camera company, was frustrated by the limited number of pictures people were taking and devised a strategy to get them to take more. Kodak’s advertising began associating photos with happiness. The goal was to get people in the habit of taking a picture whenever they wanted to show others what a good time they were having. All those smiling yearbook photos are a result of that successful campaign (as are most of the photos you see on Facebook and Instagram today).

