In a world where everything is speeding up and we rush to the next thing, slow is also good. On May 22, Carlo Petrini, the founder of the International Slow Food Movement, passed on. His work reminds us of the value of quality over quantity, clean and fair food, and the beauty of diversity — from the seeds to the hundred varieties of pasta. Petrini’s vision has blossomed. Food is medicine. That’s a basic. And, foundationally, most old foods have some magical nutritional value.