Science is a very special form of storytelling, one in which the stories told have to be testable against empirical observation. But the world is a complicated place; and, to provide a coherent account of it, scientists often find themselves obliged to join up their observable dots using untestable or as-yet-untested lines. This is a necessary part of constructing many valuable and predictive scientific scenarios; and it is perfectly good procedure as long as the assumptions involved are fully compatible with (...) what is known and testable. But it also means that, in formulating their ideas about how the world works, scientists must remain keenly aware not only of what is and is not assumption in those complex ideas, but of how untested elements may color their beliefs. The contributions to this volume cover many interesting examples of how assumptions have affected ideas in diverse areas of the paleosciences, both practical and theoretical, and they serve together as a salutary reminder that vigilance and a willingness to rethink are always in order. (shrink)

Even as paleoanthropology becomes increasingly sophisticated in revealing both the broad contours and the details of the deep evolutionary history of Homo sapiens, it continues to be informed by lingering pre-evolutionary residues. Specifically, the goal of prior research was to demonstrate that the influence of the ancient Scala Naturae as an organizing principle significantly contributed to the scientific community’s delayed acceptance of Australopithecus as a plesiomorphic member of the Hominidae. The present study extends this research through a selective examination of (...) non-primary source material reporting on significant early hominid discoveries over the last century, beginning with Australopithecus africanus and ending with Ardipithecus ramidus. It is argued that these accessible sources reify to varying degrees the perception among the non-expert public that human beings are an inevitable culmination of the evolutionary process. This culturally transmitted schema of human exceptionalism continues to impact other life on Earth in profound ways, in some cases with calamitous results. (shrink)