Secure in their isolated valley until the arrival of the white man, the Native Americans of Lake County and their ancestors lived for more than 12,000 years in this temperate Eden of abundance. The anthropologist who labeled them all by one name was mistaken though; the Pomo were actually 72 independent villages, or tribelets, that spoke at least seven distinct and mutually unintelligible languages. Theirs was a culture without war, without tyranny,...