DB, I don't think dancing around a fire in a mystical trance counts as 'research', which probably wipes out all but 50 years of the 12 thousand years of your clinical evidence.
My own experience with it, and its been a while, is that apart from almost causing me to flunk out of college.. it made me paranoid, isolated, depressed, incommunicative and incomprehensible to those around me, with nonsensical 'insights' of utterly no value.. how much happiness can come from feeling completely alone, and steadily losing your grip on reality. :roll:
One must have powerful allies to discount so completely the total of mankinds experience with the plant. You smoked too much Coldstream, moderation may well have provided you with a different experience. Certainly you were right to be unhappy with your trials, this is not the case with most users though. Some can enter the necessary altered states by practice of meditation or ritual and others need the plants, nobody gets there except through the mind/spirit/soul. Altering perceptions and building from the primitive foundations is what all of human experience is about, isn't it? There are walls, maybe you just couldn't climb them then. Find someone and try again. You owe it to your god given endocannibinoid system.:-(