How Howard Bloom, a science nerd, spent 12 years working with Michael Jackson, Prince, Bob Marley, Bette Midler, Billy Joel, Billy Idol, Joan Jett, Peter Gabriel, David Byrne, Queen, Kiss, Aerosmith, AC/DC, Simon & Garfunkel, Run DMC, and a plethora of others. And what he was looking for, the taproot of the forces of history: soul.