Lithic Technology, Human Evolution, and the Emergence of Culture
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Evolutionary Anthropology 109 ARTICLES On Stony Ground: Lithic Technology, Human Evolution, and the Emergence of Culture ROBERT FOLEY AND MARTA MIRAZO´ N LAHR Culture is the central concept of anthropology. Its centrality comes from the fact human evolution different and what it that all branches of the discipline use it, that it is in a way a shorthand for what is that it is necessary to explain. It is at makes humans unique, and therefore defines anthropology as a separate disci- once part of our biology and the thing pline. In recent years the major contributions to an evolutionary approach to that sets the limits on biological ap- culture have come either from primatologists mapping the range of behaviors, proaches and explanations. Just to among chimpanzees in particular, that can be referred to as cultural or “proto- add further confusion to the subject, it cultural”1,2 or from evolutionary theorists who have developed models to account is also that which is universally shared for the pattern and process of human cultural diversification and its impact on by all humans and, at the same time, human adaptation.3–5 the word used to demarcate differ- ences between human societies and groups. As if this were not enough for Theoretically and empirically, pa- that paleoanthropology can play in any hard-worked concept, it is both a leoanthropology has played a less the development of the science of cul- trait itself and also a process. When prominent role, but remains central to tural evolution. In particular, we want treated as a trait, culture can be con- the problem of the evolution of cul- to consider the way in which informa- sidered to be the trait or the means by ture. The gap between a species that tion from stone-tool technology can which that trait is acquired, transmit- includes Shakespeare and Darwin be used to map the pattern of cultural ted, changed, and used (that is, among its members and one in which evolution and thus throw light on the learned, taught, and socially passed a particular type of hand-clasp plays a nature of the apparent gap that lies on). It exists in the heads of humans major social role has to be significant. between humans and chimpanzees. and is manifested in the products of However, that gap is an arbitrary one, First, we discuss the various meanings actions. To add one further dimen- filled by the extinction of hominin of the culture concept and the role of sion, culture is seen by some as the species other than Homo sapiens. Pa- paleoanthropology in its use. Second, equivalent of the gene, and hence a leoanthropology has the potential to we look at how stone-tool technology particulate unit (the meme) that can fill that gap, and thus provide more of can be used to map cultural evolution be added together in endless permu- a continuum between humans and and provide insights into the cultural tations and combinations, while to other animals. Furthermore, it pro- capacities of different hominin spe- others it is as a large and indivisible vides the context, and hence the selec- cies. Third, we consider the inferences whole that it takes on its significance. tive environment, in which cultural that can be made from stone-tool In other words, culture is everything capabilities evolved, and so may pro- technology for the timing of major to anthropology, and it could be ar- vide insights into the costs and bene- events in cultural evolution. gued that in the process it has also fits involved in evolving cultural adap- become nothing.3,5–10 tations. The pervasive nature of the culture In this paper we focus on the role EVOLUTION, CULTURE AND concept means that evolutionary an- ANTHROPOLOGY thropology must also tackle the prob- lems it throws up. This is not the place Culture in Anthropology either to argue that the concept should be abandoned as of little or no Robert Foley and Marta Mirazo´ n Lahr are Culture is the jam in the sandwich at the Leverhulme Centre for Human Evo- of anthropology. It is all-pervasive. It analytical utility (one of us attempted lutionary Studies at the University of Cam- is used to distinguish humans from this several years ago, to no noticeable bridge, Downing Street, Cambridge. E-mail: 11 [email protected] and [email protected] apes (“everything that man does that effect ) nor to come up with a cut- the monkeys do not” (Lord Raglan)) ting-edge redefinition that will clear and to characterize evolutionarily de- away a century of obfuscation (we Evolutionary Anthropology 12:109–122 (2003) rived behaviors in both living apes leave that in the capable hands of the DOI 10.1002/evan.10108 Published online in Wiley InterScience and humans. It is often both the ex- Editor of Evolutionary Anthropol- (www.interscience.wiley.com). planation of what it is that has made ogy). Rather, we wish to consider how 110 Evolutionary Anthropology ARTICLES TABLE 1. Cultural Capacity Is Cognitively Based, but Is Correlated With a Number of Manifestations in the Realms of Learning, Social Organization, Symbolic Expression, and Patterns of Tradition. These Expressions May in Turn Be Visible in the Archeological and Fossil Record Broad Correlative Components of Culture Potential Paleobiological Manifestations Learning capacity Technology and technological variation Brain size? Social organization and structure Archeological density, structure and distribution Sexual dimorphism in fossil hominins Nonecologically functional elements of material culture Traits associated with symbolic thought Brain size? Anatomical basis for language Variation in material culture Tradition maintenance and change Regional variation and longevity of archeological components those aspects of anthropology that fore be a diachronic process. Compar- sistence through time). The possible deal with the deep past of the human isons between two living species, hu- paleobiological correlates of these are lineage—paleoanthropology—might mans and chimpanzees, can only shown in Table 1.12 throw light on the evolution of culture examine outcomes, not the actual pro- and the role it may have played in cess of transition. This must be in- EVOLUTIONARY HISTORY IN 12 human evolution. ferred. The actual development of THE STONES: WHAT CAN THEY The problem in attempting this is more and more culture-bearing homi- that the sources of such evidence are nins must have occurred among spe- TELL US? limited, especially if little recourse is cies that are now extinct, to whom our We can now turn to stone technol- made either to analogical or phyloge- only access is through the fossil and ogy. From over two million years netic inferences from chimpanzees archeological record. lithic artifacts provide a rich and du- and other primates or extrapolation To search for something in the fos- rable source of information about the back from ethnography and psychol- sil and archeological records requires behavior of extinct hominins, and ogy. Paleoanthropology is limited to knowing what one is looking for, so thus greatly expand on the anatomical the archeological record for the evi- that a consideration of definitions of fossil evidence. The question to ask is dence it throws either on hominin culture cannot be entirely avoided. what sort of information can be de- cognition, and hence culture, or else Definitions of culture largely fall into rived from stone tools? on the cultural manifestations of be- two broad groups. Either they involve Archeologists have basically come havior. In practice, this means using the actual end products of behaviors up with two answers to this question. the record of stone tools, the primary that are inherently human (technol- On one hand, patterns in technology source of information about the be- ogy, for example) or they focus on the have been used to reconstruct popula- havior of prehuman hominins. processes that produce these out- tion histories, in a sense to construct comes—that is, the cognitive under- phylogenies of species and popula- Culture and pinnings. Most recent approaches tions (cultures, in other words). Stone have concentrated on the latter or, in tools were, in effect, treated as popu- Paleoanthropology other words, trying to get into the lation markers. This may be consid- There are two reasons why both minds of extinct species and popula- ered the phylogenetic and historical evolution and paleoanthropology are tions. This can only be done in terms approach. On the other hand, stone central to any discussion of culture. of correlates. Most definitions of cul- tools can be and have been interpreted The first is that the distinction be- ture involve three core elements: those as adaptive markers, often with little tween humans and other species is associated with learning, its depth or no phylogenetic signal, because usually drawn in some way around and extent, or the ability to acquire they are endlessly thrown up conver- the concept of culture—put simply, new information independent of a gently by the demands of the environ- we have it and they do not. Chimpan- tightly constrained genetic basis; ment and social organization, which zees chipping away at the margins of those associated with social organiza- thus reflect variability in behavioral tool making or grappling with the ru- tion and complexity; and those asso- response. This can be termed the diments of American sign language do ciated with symbolic thought, both its adaptive function approach. not really change this state of affairs. underlying cognitive basis and its By and large, these two approaches Given the fact that humans must have communication. In addition to these have been seen as alternatives, and to evolved from an acultural organism to core elements is the extent to which be in conflict with one another.