The most effective product signals lately are the ones nobody paid to create. “The Devil Wears Prada” gave luxury fashion a cultural shortcut. You didn’t need to explain what Prada meant after that title entered our culture. Now the internet has accidentally created another one. A few days ago, a Vatican documentary trailer featuring Pope Leo XIV went viral after viewers noticed something unexpected beneath the papal robes: crisp white Nike sneakers with a black Swoosh. Sneaker forums quickly...