We are in the midst of a powerful psychedelic renaissance. After four decades of hibernation, the promise of the psychoactive '60s--that deeper self-awareness, achieved through reality-bending substances and practices, will lead to greater external harmony--is again gaining a major following. The signs are everywhere, from the influence of today's preeminent psychedelic thinker Daniel Pinchbeck, to the renewed interest in the legacy of Terence McKenna,...