Including my own experiences, I know of many people who reported having a deeper connection with Nature/Earth/Gaia and spirituality in general after taking Entheogens. What do you think about the use of these substances, particularly in regards to the current global situation and our potentially unsustainable future? I have just watched Mark Pesce´s Becoming Transhuman at google video. Pesce says humanity could and should become a race of Shamans, both looking into the transhuman domain and having our feet planted in the physical ground. I want also to recommend the podcasts at The Psychadelic Salon regarding Entheogen research and a host of other interesting subjects, most of which are recorded at Burning Man. There you can find excellent talks by Terence McKenna, Daniel Pinchbeck, Alex Grey, Ann & Sasha Shulgin, Mark Pesce, Erik Davis, Rick Doblin, Matt Pallamary.