▁San ▁Luis ▁Ob is po ▁County , ▁consisting ▁of ▁. ▁As ▁the ▁result ▁of ▁a ▁U . S . ▁government ▁investigation ▁in ▁ 1 8 7 3 , ▁a ▁number ▁of ▁Indian ▁res erv ations ▁were ▁assigned ▁by ▁executive ▁pro clam ation ▁in ▁ 1 8 7 5 . ▁The ▁commission er ▁of ▁Indian ▁affairs ▁reported ▁in ▁ 1 8 7 9 ▁that ▁the ▁number ▁of ▁Mission ▁Indians ▁in ▁the ▁state ▁was ▁down ▁to ▁around ▁ 3 , 0 0 0 . ▁ ▁Leg acy ▁and ▁Native ▁American ▁controvers y ▁▁ ▁There ▁is ▁controvers y ▁over ▁the ▁California ▁Department ▁of ▁Education ' s ▁treatment ▁of ▁the ▁miss ions ▁in ▁the ▁Department ' s ▁elementary ▁curr icul um ; ▁in ▁the ▁tradition ▁of ▁historical ▁revision ism , ▁it ▁has ▁been ▁alleg ed ▁that ▁the ▁curr icul um ▁" w aters ▁down " ▁the ▁har sh ▁treatment ▁of ▁Native ▁Americans . ▁Modern ▁anth rop olog ists ▁c ite ▁a ▁cultural ▁bias ▁on ▁the ▁part ▁of ▁the ▁mission aries ▁that ▁blind ed ▁them ▁to ▁the ▁n atives ' ▁pl ight ▁and ▁caused ▁them ▁to ▁develop ▁strong ▁negative ▁opinions ▁of ▁the ▁California ▁Indians . ▁European ▁dise ases ▁like ▁influen za , ▁meas les , ▁t uber cul osis , ▁g on orr he a , ▁and ▁d ys ent ery ▁caused ▁a ▁significant ▁population ▁reduction ▁from ▁the ▁first ▁encounter ▁through ▁the ▁ 1 9 th ▁century ▁as ▁California ▁Native ▁Americans ▁had ▁no ▁imm unity ▁to ▁these ▁dise ases . ▁ ▁The ▁impact ▁that ▁the ▁original ▁Spanish ▁system