the notion that serious intergroup conflict might be as ancient as group identity itself.” Group identity, or a shared sense of belonging to a group, is tough to glean from ancient stones and bones. Some researchers suspect that marriages between men and women from neighboring bands of hunter-gatherers fostered alliances and group identities among human ancestors as early as 2 million years ago (SN: 4/9/11, p. 13). If so, small-scale warfare originated long before the Nataruk attack,
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, says Meyer,
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, who has studied a 7,
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,000-year-old massacre at a farming village (SN: 9/19/15, p. ,
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.
Anthropologist Douglas Fry of the University of Alabama at Birmingham disagrees. Group conflicts arose approximately 10,000 years ago as some hunter-gatherers established long-term camps in areas with abundant food and water, he argues. Population growth ensued, as did competition for resources, in his view. That’s probably what inspired the Nataruk attack, Fry says. At the time of the attack, Nataruk was located in a lush, lake-studded part of East Africa.
Excavations by Lahr’s team at Nataruk and more than a dozen nearby sites indicate that the region was an attractive place to live between about 11,
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,500 and 8,
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,000 years ago. Back then, Lake Turkana extended about 30 kilometers southwest of its current boundary. Nataruk was probably situated a few kilometers from the lake, near a lagoon where the ancient attack victims were found.
Fossil finds by Lahr’s team show that a wide variety of animals once lived in and around Lake Turkana, including elephants,
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, antelopes,
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,

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