What a fabled marching band can teach you about innovation

I've got a soft spot for people who take on the status quo — of an industry, a sport, an art form — and then turn it upside down and inside out. Think Marcel Duchamp for art. Or Ray Kroc for restaurants. Or Bill Walsh for football.

One such person passed away this weekend: William P. Foster, whose obituary runs in today's New York Times. Foster was a consummate outsider — an African-American clarinetist who aspired to become a symphony conductor, only to realize that his race prevented him f...