In 1987, three white Jewish boys from New York City were the most fascinating phenomenon in the burgeoning rap music scene. No, really. The Beastie Boys, barely out of their teens, had just released Licensed to Ill , which quickly became the first hip-hop album to reach number one on the charts. Pairing vulgar and hilarious lyrics with heavy-metal-derived musical backing and a punk DIY attitude, the Beasties-MCA (Adam Yauch), King Ad-Rock (Adam Horovitz),...