How is an altered state of consciousness achieved in shamanism?
Harner: In about 90% of the world, the altered states of consciousness used in shamanism are attained through consciousness-changing techniques involving a monotonous percussion sound, most typically done with a drum, but also with sticks, rattles, and other instruments. In perhaps 10% of the cultures, shamans use psychedelic drugs to change their state of consciousness. I was introduced to shamanic work in 1961 among the Conibo Indians in eastern Peru, with the aid of native psychedelics. When I came back to the United States and no longer had my supply of ayahuasca, I experimented with drumming. Much to my surprise, it really worked. It should not have surprised me, because drums were reportedly used by shamans almost worldwide. Virtually everything you find in shamanism is done because it works. Over tens of thousands of years, shamans developed the most time-tested system of using the spirit, mind, and heart for healing, along with plant remedies, and so on. Again, the system is ti
