Liars

A widespread, secret religion, whose followers believe that there is no God, no afterlife and no inherent meaning to existence. However, they also believe that life should be treasured and happiness is a good that should be pursued. Because the depressing truth of existence is counterproductive to achieving this goal, Liars endeavor to cultivate beautiful fabrications instead; among these fabrications are faiths, political movements, and high ideals, which are designed to improve upon history and mythology in order to increase the beauty of the world.

– from George R.R. Martin’s Thousand Worlds