A typology of magico-religious practitioners is determined in a cross-cultural sample. Shamans were found in hunting and gathering societies ; Shaman/Healers and Priests in agricultural societies; and Healers, Mediums, and Malevolent Practitioners in societies with political integration. Analysis of selection procedures and activities suggests three bases for magico-religious practitioners: a universal basis related to trance states; sociopolitical power in societies with political integration ; and conflict between trance-based local power and stratified political power.