ὀρίγανον

Oríganon comes from Greek, possibly from óros (mountain) and gános (brightness, joy). The joy of the mountain. The herb grew wild across the hillsides of Greece and the eastern Mediterranean, and Greeks used it medicinally and in cooking for centuries before Rome existed. Hippocrates prescribed it. Aristotle noted that tortoises ate it after consuming a snake, which he interpreted as evidence of the herb's healing properties.

The Romans adopted both the herb and the word, Latinizing it to origanum. It spread through Europe with Roman agriculture, growing wherever Mediterranean climates allowed. But here is the historical surprise: oregano was not a defining ingredient in Italian cooking for most of Italy's culinary history. Southern Italian cooking relied more on basil, rosemary, and garlic. Oregano was present but secondary.

American GIs stationed in Italy during World War II encountered pizza for the first time. When they returned home, demand for pizza exploded. Italian-American pizzerias, many run by immigrants from Naples and Sicily, used dried oregano generously — more generously than most Italian kitchens did. By the 1950s, oregano sales in the United States had increased by 5,200 percent, according to the American Spice Trade Association. The herb became so identified with pizza that Americans assumed it had always been central to Italian food.

Oregano is now the default herb in American 'Italian' cooking. But in Naples — where pizza was born — fresh basil is the traditional topping, not oregano. The Greek herb's association with Italian food is largely an American invention, built on a misunderstanding that became a tradition.