Abstract

Although these essays derive from much previously published material, the whole is greater than its parts. The collection allows a comparative view of a variety of local knowledge systems, from that of the medieval masons who built the cathedral of Chartres to early modern cartography, and from the complex navigation system of Micronesia to present‐day research on malaria and on turbulence. David Turnbull marshals local systems of knowledge to substantiate his thesis that “there is not just one universal form of knowledge but a variety of knowledge” .Turnbull aims to show that knowledge is motley—that it is assembled out of heterogeneous components. It is a product of social labor. Its contents are pertinent to the locality in which it was produced. As such, contrary to the claims of modernist Western science, it is not rational, autonomous, and objective. Knowledge is performative and historically contingent. It is both various and able to be compared across diverse cultures. Against the claim of science to represent universal, objective knowledge, Turnbull points to the conclusions of philosophers such as Richard Rorty who have examined the indeterminacies of modern scientific and technical ways of knowing. Using an eclectic variety of studies in philosophy and the sociology of knowledge, Turnbull reiterates Wittgenstein's point that meaning consists of embodied performance and usage.For me the most illuminating part of this book is its comparison of the development of Western cartographic techniques in the “age of discovery” with the profoundly different navigational system that was developed in the Pacific by Polynesians. Turnbull shows the difficulties that early Europeans had in assembling the multitude of local knowledges about place and distance into a systematic cartographic knowledge in the interest of the state. He then discusses the profoundly different but also highly sophisticated navigational system of the Polynesians. They developed what he calls “a dynamic cognitive map,” a map based on a star compass and etak, a system of mental representation in which the canoe was conceived as stationary and a reference island as moving backward against the rising and setting points of the stars. It was a complex system of navigation that Polynesian navigators learned by long years of study from childhood; it allowed an accurate estimation of the distance traveled. Pacific oceanic navigation was based on this system of mapping and on a key, highly sophisticated technology, the seaworthy canoe. Turnbull here undermines the “great divide” between so‐called traditional knowledge systems and modern scientific ones. He effectively questions assumptions such as the one that contrasts deliberate European discoveries of the Americas with accidental Polynesian discoveries of the Pacific islands.He takes a similar approach in his discussion of the building of Gothic cathedrals, which he conceives as sites of experimental practice, as “laboratories.” He describes the cathedrals as sites of local knowledge, built with talk, tradition, and templates . Pointing to the evolution of the master mason into the architect in the fifteenth and sixteenth centuries, he suggests that thereby “theory became divorced from practice and skill became expertise” . Here Turnbull oversimplifies the later development. History itself becomes a template cut for the purposes of his own theoretical structure, rather than the complex, locally contingent, messy, and inherently interpretive entity that it is. Calling cathedrals “laboratories” and the process of their construction “technoscience” places modern categories onto the past in a procedure that can only create a distorting lens.This criticism can be directed at many social studies of science that use historical examples and is not meant to detract from the great value of this collection of interrelated studies. For modern science, Turnbull emphasizes both the motley assemblage and indeterminacy of scientific practices . Rather than modern science being superior to other knowledge systems, both are based on local practices. The question then becomes not how scientific methodology achieves universal, objective truth, but how technoscientific knowledge spaces achieves apparent universality and connectedness. Turnbull's answer includes technical devices and social strategies that treat various instances of knowledge/practice as equivalent and that make connections through ordering. He also shows the legitimacy and sophistication of knowledge systems that developed before or outside of modern technoscientific knowledge, and he creates a legitimizing space for both kinds, emphasizing the value of comparison and reciprocity. Rejecting the extremes of both the modern and the postmodern, he aims to create a middle ground that he calls the transmodern, a ground in that reciprocal dialogue between scientific and other kinds of knowledge systems can create both new insights and concrete human progress. This book is a valuable contribution toward such a goal