How did a decade that dawned with the Age of Aquarius end in Altamont and the Manson Family bloodbath? The 1960s were a time of revolution - political, social psychedelic, sexual. But there was another revolution that many historians forget the rise of a powerful current that permeated pop culture and has been a central influence on it ever since. It was a magical revolution - a revival of the occult. Previously rejected and ridiculed beliefs took centre stage, reaching the Beatles and the Rolling Stones, saturating the the hippies and flower power, hitting the big screen with Rosemary's Baby and the bookshelves with Lord of the Rings. The Tarot. I Ching, astrology, Kabbala, yogis, witchcraft, UFOs, Aleister Crowley. Yin Yang and the Tibetan Book of the Dead now became the common currency they are today. But the vibes went bad, the auras darkened. Did that darker undercurrent win out? Gary Lachman here charts this explosion, its rise and fall, and its enduring legacy