Abstract
At the very beginning of the history of philosophy, with Plato, we are told the strange story of some men dwelling in a cave and looking at shadows. Immobilized by chains since childhood for all their lives, they are forced to sit on the cave's floor and are impeded from standing up. Hence, whoever they are and whatever they do, the label Homo erectus as a general category denoting the vertical posture of the human animal is decidedly unfit for their position. The strange story, however, goes on and recounts how one of them, by managing to get rid of the chains, for the first time rises to his feet. The familiar feature of Homo erectus, intended not as an extinct hominid species but as the postural human standard ..