John Harvey Kellogg was a famous American physician. His brother Will was an ingenious businessman. Together, they invented flaked cereal and revolutionized American breakfast. But John Harvey and Will were bitter rivals, and they waged war over the very food that made them famous. So which Kellogg is the one whose name we remember today?

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.