The senior god withdrew and left the world to junior powers

This page groups pantheons by how one generation of gods gave way to the next. Wikipedia notes that "conquests could lead to the subordination of the elder culture's pantheon to a newer one, as in the Greek Titanomachy, and possibly also the case of the Æsir and Vanir in the Norse mythos." Browsing by divine succession lets a visitor trace how a pantheon's ruling generation changed over time.