An inspiring story. Jeff Hammerbacher seems like a fascinating individual, a true polymath / renaissance man. Here's another good interview: https://www.youtube.com/watch?v=iq8R__O8mNc
Bi-polar disorder seems to be common in the renaissance man. I'm sure there's a list of notable people who are bi-polar. I often wonder if the break throughs from these individuals are enabled by the manic periods of genius.