When Aerosmith manager Tim Collins answered his phone one day in early 1986, he was, at first, confused. The voice on the other end belonged to Rick Rubin, the 22-year-old hip-hop producer and entrepreneur behind Def Jam, the fast-rising record label he had founded while still a film student at New York University. Rubin, a rock kid who’d grown up – or, rather, who hadn’t – on the gonzo kicks of...