“Popularity is not a state of grace. In business, it is treasure hard-won on the battlefields of product development and marketing, then leveraged or squandered or stolen back. Most of the products and ideas showcased here—the stuff we buy, sell, and otherwise consume the most—owe their status in part to aggressive sales tactics, from knocking on doors to strong-arming grocers to gain the best shelf space. In its most potent and permanent form, however, popularity transcends sales pitches, advertising, fads, and maybe even conscious choice. Read more.