Given the task definition and input, reply with output. In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

According to one source, this deity sometimes hangs out at a sunken bank and drinks from golden cups with the goddess Saga. This deity's position was usurped for a decade by a crafty wizard named Ollerus. He fathered a son with a goddess known alternately as Fjorgyn or Jord. He presided over twelve judges called the Diar in his hall Gladsheim, while his other hall contained a throne from which he could see the entire universe called (*) Hlidskjalf. He gives all of his food to the wolves Geri and Freki and learns about the world from his ravens Hugin and Munin. With his brothers Vili and Ve, he killed the giant Ymir and fashioned the world from the body. This god carries the spear Gungnir and rides the eight-legged horse Sleipnir. For 10 points, name this one-eyed All-Father, the chief god of the Norse pantheon.
Social Science