Long ago I proposed a probably silly the theory that Neanderthals may have died out and Homo sapiens lived on as a species because the Neanderthals were realists and Homo sapiens--humans--were and are superior fabulists. Sapien language allowed our ancestors to create a fictive environment which affected increasingly massive changes in the real physical environment. But human imagination trumps the real only to a certain extent, because it is a subset, an epiphenomenon of the real, ding an sich.