▁Yan om ami , ▁Sur v ival ▁International ▁and ▁C CP Y , ▁the ▁Brazil ian ▁government ▁finally ▁recognized ▁Yan om ami ▁land ▁rights ▁in ▁ 1 9 9 2 ▁just ▁before ▁the ▁UN ’ s ▁Earth ▁Sum mit . ▁ ▁Yan om ami ' s ▁unique ▁role ▁among ▁his ▁people ▁has ▁been ▁commented ▁on ▁ske pt ically ▁even ▁by ▁those ▁sympath etic ▁to ▁him ▁and ▁his ▁cause . ▁ ▁Anth rop ologist ▁Napoleon ▁Ch agn on ▁wrote ▁regarding ▁Yan om ami : ▁ ▁Sur v ival ▁International ▁and ▁many ▁others ▁with ▁extensive ▁experience ▁of ▁the ▁Yan om ami ▁have ▁sever ely ▁critic ized ▁Ch agn on ’ s ▁work ▁which ▁port ray s ▁the ▁Yan om ami ▁as ▁‘ s ly , ▁ag gress ive , ▁and ▁int im id ating ’ ▁and ▁f als ely ▁claims ▁that ▁they ▁‘ live ▁in ▁a ▁state ▁of ▁chron ic ▁war fare ’ . ▁This ▁character ization ▁has ▁und ou bt edly ▁been ▁det r iment al ▁for ▁them . ▁ ▁It ▁was ▁referred ▁to ▁by ▁the ▁Brazil ian ▁government ▁when ▁it ▁planned ▁to ▁fragment ▁Yan om ami ▁land ▁in ▁ 1 9 8 8 , ▁in ▁a ▁proposal ▁which ▁would ▁have ▁been ▁cat ast roph ic ▁for ▁the ▁Indians ▁and ▁which ▁was ▁only ▁prevent ed ▁by ▁a ▁vig orous ▁campaign . ▁ ▁Ch agn on ' s ▁views ▁in ▁this ▁matter ▁were ▁critic ized ▁by ▁investig ative ▁journalist ▁Patrick ▁Tier ney ▁in ▁his ▁much - def amed ▁book ▁Dark ness ▁in ▁El ▁Dor ado