That number dwindled so rapidly that by the 1920s fewer than 20,000 Indigenous people were left alive, and many tribes, including the Muwekma Ohlone Tribe, were officially declared “extinct.” …That number dwindled so rapidly that by the 1920s fewer than 20,000 Indigenous people were left alive, and many tribes, including the Muwekma Ohlone Tribe, were officially declared “extinct.” …