Well from what I know they did use obsidian, they did live in large numbers and did take shelter in the highlands. Hope this helps
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a constitutional arrangement by which power is equally distributed between a central government and state governments
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To slow down the arms race.
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The woman in white is wilkie collin's fifth published novel,written in 1859.it considered to be among the first mystery novels and is widely regarded as one of the first (and finest) in the genre of "sensation novels".