No. I spotted the citation on Wikipedia. My knowledge of California languages comes from Mithun, but I don't find them very interesting--most lack the complex agglutinative or polysynthetic features found elsewhere.You read Golla's book on Californian Amerindian languages?
Perhaps. It implies that people were pretty isolated.Maybe California's enormous linguistic and ecological diversity was a factor in the lack of more complex societies?
I suspect it may have to do with climate. The temperate rainforests of the PNW, combined with the fish-filled waters and salmon runs, meant that the people of the PNW had to spend less time gathering food, which meant more time for pursuing other professions. Another factor would be the cedar (redcedar, Thuja plicata, in the south and yellowcedar, Cupressus nootkatensis, in the north), which is in many ways the perfect tree for just about anything you want to do: build a house, make a canoe, carve a crest pole, weave clothes from the outer bark, eat the inner bark, make bent-wood boxes from the planks, make red dye from the bark...I'd also be curious to know why the richer culture and artistry stayed further north and didn't make much progress south beyond Oregon
Yes, California was the source of dentalia and abelone shells, which were highly valued and used as currency and jewelry in the PNW.especially since I vaguely recall hearing that some groups like the Tlingit and Haida traded as far south California and Baja California