From ancient philosophy to contemporary theories of fiction, it is a common practice to relegate illusory appearances to the realm of the non-existent, like shadows on the wall of Plato's cave. Contrary to this traditional mode of drawing a metaphysical distinction between reality and fiction, Markus Gabriel argues that the realm of the illusory, fictional, imaginary and conceptually indeterminate is as real as it gets.Being in touch with reality need not and cannot require that we overcome appearances in order to grasp a meaningless reality which exists 'out there', outside and maybe even beyond our minds. Human mindedness (Geist) exists in the mode of fictions through which we achieve self-consciousness. This novel approach provides a fresh perspective on our existence as subjects who lead their lives in the light of self-conceptions.Fictions also develops a social ontology according to which the social unfolds as a constant renegotiation of dissent, of different points of view onto the same reality. Thus we cannot ever hope to ground human society in a fiction-free realm of objective transactions. However, this does not mean that truth and reality are somehow outdated concepts. On the contrary, we need to enlarge our conception of reality so that it fully encompasses ourselves as specifically minded social animals.This major new work of philosophy will be of interest to students and scholars throughout the humanities and to anyone interested in contemporary philosophy and social thought.