It is an induction, as wide as the world--being based on mythologies from all parts of the world--that myths are aetiological, that their purpose is to give the reason of things, to explain the origin of fire, agriculture, civilisation, the world--of anything, in fact, that to the savage seems to require explanation. In the animistic period, man found gods everywhere because everywhere he was looking for gods. To every object that arrested his attention, in the external world, he put, or might put, the question, 'Art thou there?' Every happening that arrested the attention of a whole community, and provoked from the common consciousness the affirmation, 'Thou art there,' was, by that affirmation, accepted as the doing of a god. But neither at this stage, nor for long after, is there any myth. The being, whose presence is thus affirmed, has at first no name: his personality is of the faintest, his individuality, the vaguest. Mythology does not begin until the question is put, 'Why has the god done this thing?' A myth consists, or originally consisted, of the reason which was found and adopted by the common consciousness as the reason why the god did what he did do. It is in this sense that myths are aetiological. The imagination which produces them is, in a sense, a 'scientific imagination.' It works within limits. The data on which it works are that this thing was done, or is done, by this god; and the problem set to the mythological imagination is, 'Why did he, or does he, do it?' The stories which were invented to answer this question constituted mythology; and the fact that myths were invented for the purpose of answering this question distinguishes them from stories in the invention of which the imagination was not subject to restriction, was not tied down to this god and to this action of his, and was not limited to the sole task of imagining an answer to the question, 'Why did he do it?' All myths are narratives, but not all narratives are myths. Some narratives have men alone for their heroes. They are imaginative but not mythological. Some narratives are about gods and what they did. Their purpose is to explain why the gods did what they did do, and those narratives are mythological.