The current issue of Vanity Fair has a profile of William Ackman, the billionaire hedge fund manager who’s trying to bring down Herbalife. Ackman’s friends and enemies call him Bill; I know him as Billy.

You see, Billy Ackman and I grew up together in Chappaqua, New York. He was a year ahead of me in school. Our families went to the same synagogue. I knew his parents, and his older sister and my sister were in the same class. We weren’t friends, and he never made much of an impression on me. He was smart, but in the way many kids in Chappaqua were smart: he got good grades, obsessed about college, went to Harvard.

What I didn’t know was this: [click to continue…]