As academics debate the value of Clayton Christensen's "theory of disruption," this is how Taco Bell's Jeff Jenkins thinks about disruption. His college, the University of Virginia, interviewed him for a series they do on alumni, and it was fascinating to hear him talk about about he saw his job and business. The idea of disruption—of the rapid rise of a new competitor, who eats your lunch (heh)—is so deeply ingrained in this generation of businesspeople.