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Glynn Isaac Defines the Homebase Hypothesis It has been argued since Darwins day that the great apes were mans nearest living relatives and as evidence emerged during the late 1960s of the hunting propensities and simple tool use of chimpanzees Goodall 1986 anthropologists found more and more reason to presume similarity of behavior between modern eg Pan troglodytes or Pan panicus and ancient varieties of hominids Tanner 1981 Still modern humans are not chimps Substantial differences of behavior exist between the great apes and hominids and it was the late Glynn Isaacs notion that these differences began early in our history Specifically he noted that the modern human habitually carries tools food and other possessions either with his arms or in containers communicates with other humans by a spoken language that the acquisition and sharing of food is a corporate responsibility that modern human hunter-gathers conduct their foraging operations in the vicinity of communal gathering places or home bases and that humans seek to acquire high-protein foodstuffs by hunting or fishing None of these are common behavior among the apes or are practiced to the extent that they are among Homo sapiens sapiens Isaac 1978 He also noted tool use both for gathering foods and for processing them for consumption and different modes of social behavior including long term pairing bonds marriage between male and female humans and complex rules of kinship and interpersonal behavior Many or all of these differences Isaac felt analyzing the archaeological data-- primarily broken stones and bones and geological reconstructions of ancient landscapes-- had been established at some point between 25 and 15 million years BP Moreover rather than being incidental they were part of a novel adaptive strategy which led to modern Homo sapiens Earlier researchers had attempted to establish sequences for the appearance of modern human characteristics-- movement to the savanna bipedalism tool use hunting brain enlargement etc
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