As the lead singer for the Rolling Stones, Mick Jagger virtually invented the concept of the rock & roll frontman. Taking his cues from soul singers, bluesmen, and Elvis Presley, Jagger crafted a magnetic, carnal persona that retained its charisma even after it was mimicked and expanded by countless singers who followed in his footsteps. He may have been surrounded by disciples, but Jagger never left the spotlight, touring with the Rolling Stones until he was in his seventies. Unlike his lifelong collaborator Keith Richards, Jagger always seemed eager to explore territory outs...