Back to the Caves, real and allegorical. In addition to the metaphysical allegory of Plato's Cave, there are political, ideological, versions in which the prisoners are brainwashed by their masters into believing the oppressive social structure they live in is the natural order of things. But even our attempts to understand the "art" of prehistory, in Lascaux, for instance, can only be speculative, and perhaps projections of our own ideologies.