Totemism is a sort of cult rendered to animals and plants which are regarded as akin to the tribe. It must be remembered that primitive man was not nearly so convinced of his superiority as is modern man. Wolves and bears and foxes are strong and cunning, and seem to him to have a power and knowledge even superior to his own. Strange as it appears to us to-day, savages quite often assign their origin to some animal and regard that animal as the possessor of a force which is valuable to his kin. This cult of totemistic animals and plants is at the base of the tales of metamorphosis which we read in Classic literature or in our own fairy tales. "Beauty and the Beast" is an example of this transformation, which our ancestors looked upon as quite natural; while the savage tales of the werewolf go back to the same outlook. The serpent in the Garden of Eden is another instance of the same cycle of ideas. The application of our present knowledge of totemism to mythology has been very enlightening. Students of Greek literature used to wonder why all the gods had birds and animals as companions. As a matter of fact, these animals were once sacred totems. The eagle and the swan were gradually displaced by Zeus, the sky deity. But so gradual was {17} this displacement that the animals became attributes of the younger deity, while he was thought to change himself at times back into the totem animal. The story of Leda and the swan can, in this way, be easily understood. Many myths are explanations of rites which were no longer understood. Such myths are called aetiological. They are answers to questions which worshipers were bound, sooner or later, to ask. The myth of Prometheus, the Titan who stole the fire from heaven to succor men, was connected with the use of eagles on the front of temples to ward off lightning. Originally, the story concerns the punishment of the eagle, but is later attached to Prometheus. It is, according to Reinach, the development of the following naive dialogue: "Why is this eagle crucified? It is its punishment for having stolen the fire from heaven." Other examples of aetiological myths are the Phaethon legend, the story of Hippolyte, and some of the stories told about Heracles.