One of the great adventures of the 20th century is the story of LSD. A warped, unlikely slice of history not taught in schools, it has flavoured many aspects of life to this day. The countercultural explosion of the Sixties influenced the broader Western world - art, music, politics, religion, social issues and much more - and at its vanguard were key figures who believed that enlightenment might be found through the use of psychedelic drugs. These utopian mavericks were from all sorts of different backgrounds and they wanted nothing less than to turn society completely on its head, to change its value system.