In video number 45 from The Little BIG Things Video Series, Tom tells us the single source of innovation is angry people. Their anger allows them to penetrate the resistance they encounter.
You can find the video in the right column of the front page of tompeters.com or you can watch the video on YouTube. [Time: 2 minutes, 57 seconds] You can also download a PDF transcript of the video’s content: Innovation: Angry People Make Change.