The Middle to Upper Paleolithic transition is a key period of change in the prehistory of the Old World and one of the most studied issues in paleoanthropology, as the nature of the transition(s) is still, after at least a century of archaeological research, largely unknown. Many of the issues at stake in the transition relate to the problem of building a reliable chronology for this period, which is at the limits of the radiocarbon method. The papers in this volume show that much progress has been made in our chronological knowledge of significant aspects of the transition, such as the age of the most recent Neandertal fossils and the earliest modern human remains in Europe, and the inferred overlap between the Châtelperronian and the Aurignacian. At the same time, the volume also shows where the chronological database for the period 40 to 30ka (14)C BP is flawed and that significant contextual and methodological problems have been underestimated in a number of studies of the biological and cultural changes during this crucial period. Chronology is employed by paleoanthropologists to relate the record of the Middle to Upper Paleolithic transition to major biological and cultural developments. This paper takes a broader paleoanthropological perspective and attempts to evaluate and, to some degree, synthesize the main results of these proceedings, while also presenting a brief discussion of the Middle and Upper Paleolithic archaeological and fossil records, and possible explanations for the differences between the two, focusing on the role of differences in the ecology of Neandertals and early European modern humans.
