Comment sommes-nous devenus humains? Quelle est la place de l'homme dans le vivant au XXIe siècle, vers quoi tend son devenir? Fort de son expérience de paléoanthropologue, mais aussi d'homme ancré dans son siècle et curieux de tout, le découvreur de Lucy interroge les grands enjeux de demain : l'écologie, la démographie, et bien sûr l'éthique. Etre humain et le rester est une aventure, une énigme, un défi qui nous concernent tous. Yves Coppens nous convie à un voyage dans le (...) temps et l'espace, à la découverte d'une matière en perpétuelle évolution : l'Homme. Chacun de ses invités, en livrant le récit de ses expériences et de ses recherches dans des domaines aussi variés que la philosophie, les sciences sociales ou la génétique, propose une vision singulière de l'humain en déroulant le fil lumineux de son devenir. (shrink)

For many years, M. Jean d'Ormesson has been doing me the honor of asking me to write for Diogenes. More recently, he suggested that I should coordinate an issue of this review that would be devoted to my extended discipline, History, but history in the way in which I understand it. It was certainly not for lack of interest that I did not reply to the first request but, no doubt, because of the sense of a chronic lack of time (...) - almost a pleonasm - from which I, like everyone else, suffer. It was not because I was cured that I accepted the second invitation but probably because I allowed myself, with full knowledge of the facts, to entertain the idea that editing an issue would take up less time than simply contributing. … In fact, as everyone knows, the opposite is true, especially when the occasional editor also volunteers to be one of the contributors. This issue is now completed and I sincerely thank M. Jean d'Ormesson for having wished to entrust me with this task that I have enjoyed very much. (shrink)

In order to tell the story of Man and understand our emergence better, we can readily follow on from Heinz Tobien, though we do not need to go back so far in time - just a few million years.Clearly, our fundamental origin is animal. Thus it is easy to understand that in the great genealogy (known as phylogeny), there was one vital (geological) moment when our line was forever detached from the animal “kingdom.” The evidence of palaeontology, like that of (...) molecular biology, today locates this point - which is, by definition, the very point of origin of our family, the hominids - in Eastern Africa around 8 million years ago. In order to state this, palaeontology rests on two sets of results. All the most ancient hominids, without exception, are East African, and the oldest of all goes back more than 7 million years. Through the study of various characteristics of the cells of contemporary primates, having arranged them in an order of increasing complexity and having hypothesized that this contemporary complexity may be a reflection of that which developed through time, molecular biology has, on the basis of palaeontological dating, calibrated this transformation and its different stages and constructed what is called a molecular clock. In this way, it has arrived at two conclusions. The primates closest to Man are by far the great African apes (chimpanzees, gorillas), and the “distance” that separates us - in other words the degree of difference that exists between them and us - situates the divergence of our two branches at just over 7 million years. (shrink)