(p. 299) Innovation Source No. 1 is Pissed-Off People.
Irritation. Anger. That’s the number one source of serious innovation. Which must, of course, be coupled with spine–a willingness to take on the powers that be. And risk it all.
Peters, Tom. Re-Imagine! London: DK, 2003.
(Note: italics, bold, and larger size font, in original.)