The real estate agent had to go door-to-door in the apartment building we wanted to rent, asking if it was OK for this interracial family - my mom is white and I was a 1-year-old half-African kid - to live in the apartment building.

Then about 12 years ago it dawned on me that folk music - the music of Woody Guthrie and Phil Ochs, early Bob Dylan, Johnny Cash, Pete Seeger - could be as heavy as anything that comes through a Marshall stack. The combination of three chords and the right lyrical couplet can be as heavy as anything in the Metallica catalogue.

Music, I think, is best when it honestly explores personal demons, and it stirs around in the silt of the psyche to find out what's really there.

I didn't abandon my studies. Because I was, through no - clarify this. Through no particular genius of my own, I was the first person from Libertyville Public High School to attend Harvard, not because I was smarter than anyone or better than anyone, but no one had ever applied before. It was like University of Illinois, a fine institution, was the sort of the upper echelon of places where kids went from that school. And so I felt sort of a duty to myself and my peers to continue with those studies, and to continue to, intellectually arm myself for my coming struggles.

I have another name for what they're terming whistleblowers, and that's righteous heroes. From Bradley Manning to Snowden. They're people of conscience who are unwilling to turn a blind eye to the crimes of our government. And thank goodness for them.

When I am most successful as a guitar player is when I'm able to just sort of lose myself. You stop thinking about technique or anything like that and just trying to evoke the emotion of that song brings, which is a very strong emotion for me.

I didn't grow up with my Kenyan family. I grew up in a small, conservative suburb of Chicago.