ulation ▁worked ▁on ▁by ▁Andre ▁G under ▁Frank , ▁Giovanni ▁Arr igh i , ▁Sam ir ▁A min ▁and ▁W aller stein . ▁ ▁Return ▁to ▁Brazil ▁ ▁D os ▁Santos ' ▁return ▁to ▁Brazil ▁started ▁with ▁his ▁work ▁analyz ing ▁the ▁reality ▁of ▁life ▁in ▁Brazil ▁while ▁he ▁was ▁still ▁in ▁Mexico , ▁as ▁well ▁as ▁his ▁participation ▁in ▁the ▁political ▁re organ ization ▁of ▁the ▁Bra z ili ans ▁who ▁were ▁ex iled ▁by ▁the ▁military ▁regime , ▁looking ▁for ▁a ▁un ification ▁between ▁social ists ▁and ▁labour ers , ▁which ▁he ▁achieved ▁in ▁the ▁meeting ▁of ▁Lis bon . ▁He ▁was ▁granted ▁am n esty ▁in ▁ 1 9 8 0 ▁and ▁returned ▁to ▁the ▁country ▁in ▁January ▁of ▁that ▁year . ▁ ▁He ▁became ▁one ▁of ▁the ▁found ing ▁members ▁of ▁the ▁Democratic ▁Labor ▁Party ▁in ▁Brazil ▁( P DT ), ▁which ▁based ▁itself ▁in ▁social ism . ▁He ▁then ▁ran ▁as ▁a ▁candidate ▁for ▁the ▁role ▁of ▁Governor ▁in ▁Min as ▁G era is ▁in ▁ 1 9 8 2 ▁and ▁federal ▁deput y ▁in ▁ 1 9 8 6 , ▁with ▁both ▁attempts ▁failing . ▁ ▁During ▁the ▁ 1 9 8 0 s , ▁he ▁strength ened ▁his ▁links ▁to ▁the ▁United ▁Nations ▁and ▁became ▁a ▁consult ant ▁in ▁the ▁United ▁nations ▁University ▁( UN U ) ▁and ▁UN ES CO . ▁He ▁also ▁became ▁the ▁president ▁of ▁the ▁Latin ▁American ▁Soci ology ▁Association ▁( AL AS ), ▁a ▁member ▁of ▁the ▁executive ▁cons ul ▁of