In the last chapter I gave some account of the present condition of the science of ethnology in its bearing on the problems raised by the complex relations between medicine, magic, and religion. It was seen that there is a great similarity throughout the world, not only in those practices which bring medicine into intimate relations with magic and religion, but also in the domestic or strictly medical remedies so often found side by side with those used by the magician and the priest. The problem now in special need of solution is whether these similar practices have arisen independently in different parts of the earth, or have developed in some one locality, whence they have been carried to their present areas of distribution by the wanderings of people.