Rock's longest, strangest trip, the Grateful Dead were the psychedelic era's most beloved musical ambassadors as well as its most enduring survivors, spreading their message of peace, love, and mind-expansion across the globe throughout the better part of three decades. The object of adoration for popular music's most fervent and celebrated fan following -- the Deadheads, their numbers and devotion legendary in their own right -- they were the ultimate cult band, creating a self-styled universe all their own; for the better part of their career orbiting well outside of the mainstream, the Dead became superstars solely on their own terms, tie-dyed pied pipers whose epic, free-form live shows were rites of passage for an extended family of listeners who knew no cultural boundaries.