Today, we are in the middle of a sea change in the perception and use of psychedelics unlike anything that has occurred in recent decades and probably going back many centuries, at least in Western history. In fact, one probably has to go back to the early Christian era to see psychedelics so commonly used and accessible. And while there are a lot of great books that have been written on the subject over the last five decades, it's not easy to find a good general overview that is fully contem...