Abstract

The nature of human mind is a key subject for philosophy and for psychology. It is agreed that many of its characteristics and performances have been built during the last 7 million years of our primate evolution. That period began with what is called the pan-homo split, the divergence in primate evolution from the Last Common Ancestor (LCAncestor) we share with chimpanzees. The mental specificities that differentiate us from our chimpanzee cousins have been built up during that time. As consequence, philosophical and psychological investigations relative to the nature of human mind should analyze that period. But this has been done only in a limited way so far. On part because the recent discipline of Evolutionary Psychology covers only a limited segment of that period and also because Husserl, the founding father of Phenomenology, took the position to not address a possible evolutionary nature of human mind (the “proscription of anthropology in Phenomenology”) [1]. We would like here to recall these limitations and introduce possible openings (this is a continuation of an already presented approach [18] [4]). Evolutionary Psychology is interested in the life and social habits of our hunter-gatherer ancestors in order to highlight mental states that were pertinent for them but do not fit with our today lives. The pre-human period considered by Evolutionary Psychology is the Pleistocene which began 2.5 million years ago. At about that time our homo-habilis ancestors were already significantly more evolved and more performant than the LCAncestor we share with chimpanzees (larger brain size, fabrication of stone tools, hands capable of precision grip, …). This means that at the beginning of the Pleistocene our ancestors were already well advanced in their evolution toward today humans. This shows that the build up of our human characteristics and specificities began before the Pleistocene, and neglecting the pre-Pleistocene time puts at risk of missing some root causes of our human specificities. This brings to consider that Evolutionary Psychology should take into account the pre-human period beginning at the pan-homo split, not only at the Pleistocene. Regarding philosophy, the proscription of anthropology in Phenomenology is currently challenged with some interest in Evolutionary Psychology [9] [8]. To avoid the risk of limiting human evolution to Pleistocene Phenomenology should explicitly plan to use anthropology on the whole evolutionary period beginning at pan-homo split. In such a perspective some help could come from an existing evolutionary scenario starting at pan-homo split and introducing a nature of self-consciousness associated to anxiety management [4]. The scenario introduces an Evolutionary Engine based on primate intersubjectivity which could have led our ancestors to build a representation of their own entity, thus leading to a natural build up of self-consciousness. Part of the scenario is also about identifications with suffering conspecifics which may have been the source of a huge anxiety, not taken into account so far and leading to an Evolutionary Anxiety intertwined with the nature of self-consciousness. It is shown that a synergy between the evolution of self-consciousness and anxiety management happened before Pleistocene, making pre-Pleistocene a key period for understanding the nature of our human minds. Overall, the scenario proposes a rationale for the pan-homo split, a tentative explanation of the divergence in pre-human primate evolution. It is also recalled that the concept of Evolutionary Anxiety makes available an entry point to the nature of human evil [14]. We present the above points and use the proposed evolutionary scenario for a reading of human evolution from last common ancestor to today humas. Continuations are introduced.