On stands Friday, we present the third installment of Rolling Stone's Fortieth Anniversary retrospective. This time around, we talk to some of the biggest names in music, film, politics and science to discuss the current state of the nation, and the future outlook for the world. We also let twenty-one cutting-edge musicians muse about what they think the future of music holds. Throughout the week, we'll reveal exclusive features from the magazine, including audio excerpts and an in-depth look into the weird and wacky Indie Rock Universe. First up, we have exclusive audio clips (and a full-text interview) from Bono, who grapples with the question "If you could only pursue U2 or activism, which would it be?"