As everywhere else, the practice of shamanism in California centers about disease and death. It is probably more narrowly limited to this phase than in most other portions of North America. Being an essentially unwarlike even though a revengeful people, it is natural that the supernatural power personally acquired by the California Indian should not often be directed toward success in battle. Success in love is also less often the result of such personal power than for instance on the Plains, perhaps because in the latter region the custom which made virtually every young man seek shamanistic power, resulted in a condition where those whose proclivities were not toward medicine or war, desired and received their powers in this direction. Influence over game and over nature's yield of vegetable products was sometimes attributed to shamans in California, but on the whole their powers in this respect were not very much insisted upon except in Southern California, favorable or adverse conditions of this kind being attributed rather to the tribal ceremonies, and in the Northwest connected with the all-important formulae. The causing and prevention of disease and death were therefore even more largely the predominant functions of the person who had acquired personal supernatural power in California than elsewhere in America. That the medicine-men who could cure diseases were also the ones who must cause it, unless it were the direct consequence of an infraction of some religious observance or prohibition, was the almost universal belief, which was probably adhered to with greater definiteness than in most portions of North America. The killing of medicine-men was therefore of frequent occurrence. Among some tribes, as the Yokuts, the medicine-man who had lost several patients was held responsible for their death by their relatives. Among the Mohave also murder seems to have been the normal end of the medicine-man. In the Northwestern region the shaman who failed to cure was forced to return the fee received in advance. If he refused to attend a patient when summoned, he was compelled to pay, in the event of the latter's death, an amount of property equal that proffered him for his services. So completely was the shaman regarded as the cause of disease and death, as well as of their prevention, that one hears very little among the California Indians of witchcraft, that is to say, of malevolent practices performed by persons, often very old or very young people, who are not believed to be endowed with the shaman's power of curing.