Why did human evolution diverge from that of our closest primate relatives? What can studying apes tell us about early human social structures? What actually makes us different? In the richly illustrated and referenced Apes and Human Evolution, University of Chicago Professor of Anthropology and Evolutionary Biology Russell Tuttle synthesizes virtually all we know about such questions to produce an authoritative history of the evolution of us. Below, Tuttle outlines some of the major topics addressed in the book, which he’ll be presenting at Chicago’s Seminary Co-Op Bookstore on March 20th.
In Apes and Human Evolution, I argue that since the 19th-century evolution revolution, theories of human evolution have been biased by folk beliefs about the meaning of individual, sexual and group differences in appearance and customs and by world events, like warfare, and personal experiences of theorists. As apes became subjects of detailed study their behavior served variously to reinforce or refute notions of close similarity between them and us.
Over the past 45 years scientists who trained in programs devoid of anthropology have developed models that emphasize increasingly close affinity between African apes and humans. Some of them claim that chimpanzees are actually people (Homo troglodytes and Homo paniscus) or that people are somewhat more cultured chimpanzees (Pan sapiens). Such claims, abetted by popular books and other media, exemplify poor evolutionary anthropology and are offensive toward the very communities and heads of state to whom we must appeal for scientifically informed preservation of apes and their habitats.
Although the old argument about which nonhuman primates are closer to humans has settled on the apes, many puzzles remain regarding the extent to which we can draw on them as models for specific aspects of our variable genomes, morphology and behavior. Rare major and many minor fossil discoveries underpin phylogenic models of primate evolution over a span of geologic time greater than sixty-five million years, but small samples of fragmentary specimens and very patchy spatiotemporal representation usually limit their informational value. Our Linnaean family, the Hominidae, contained a notable number and variety of species that is difficult to organize into phylogenic lineages, only one of which terminated in modern Homo sapiens.