This book represents the culmination of the framework developed by Georges Dumézil throughout all his work, which places him among the authorities in the study of mythology. Their model consists of the classification of the various gods in three functions: the management role of the sacred, the role of power (physical, political) and the production function (agriculture, fertility). The main thesis is Dumézil establish the correspondence between the mythical and theological framework the social organization of the Indo-Europeans. His research is in charge of tracking the various geographical areas of the term mythology and the manifestations of this approach.