It’s been over 50 years since bands like the Grateful Dead, Jefferson Airplane and Big Brother and the Holding Company burst out of the San Francisco scene, taking the lead on a psychedelic revolution that expanded the boundaries of rock ’n’ roll. Of course, it wasn’t just boundaries that were expanded, but minds as well. Lord knows how many humans have been inspired to take a different path—the road less travelled, perhaps—by some piece of music from th...