i . ▁In ▁ 1 9 9 9 , ▁he ▁published ▁Not ebook . ▁It ▁was ▁a ▁review ▁of ▁the ▁European ▁culture ▁policy ▁and ▁how ▁it ▁should ▁be ▁implemented ▁in ▁Cro atia ▁but ▁it ▁never ▁came ▁to ▁a ▁real ization . ▁ ▁Zu ppa ▁established ▁the ▁" Center ▁for ▁dram atic ▁arts ", ▁the ▁inst itute ▁called ▁" Open ▁society " ▁and ▁" The ▁imag in ative ▁a cademy ". ▁ ▁He ▁was ▁introduced ▁in ▁the ▁edition ▁of ▁" 2 0 0 0 ▁out standing ▁sch ol ars ▁of ▁the ▁ 2 0 th ▁century ▁( I BC ; ▁Cambridge )", ▁with ▁the ▁explanation : ▁" in ▁honor ▁of ▁an ▁out standing ▁contribution ▁in ▁the ▁field ▁of ▁dram at ology ". ▁ ▁Zu ppa ▁was ▁also ▁very ▁polit ically ▁active ▁and ▁gained ▁a ▁reputation ▁as ▁a ▁left - wing ▁intellectual . ▁He ▁was ▁a ▁member ▁of ▁the ▁League ▁of ▁Commun ists ▁of ▁Cro atia ▁and ▁the ▁later ▁reform ed ▁Social ▁Democratic ▁Party ▁of ▁Cro atia ▁( SD P ). ▁He ▁left ▁SD P ▁in ▁the ▁early ▁ 1 9 9 0 s ▁due ▁to ▁his ▁opinion ▁that ▁I v ica ▁Ra č an ▁didn ' t ▁change ▁the ▁author itar ian ▁system ▁of ▁the ▁party ▁and ▁that ▁it ▁didn ' t ▁have ▁any ▁real istic ▁social ▁dem ocr atic ▁platform . ▁He ▁joined ▁the ▁Social ▁Democratic ▁Action ▁of ▁Cro atia ▁in ▁ 1 9 9 4 ▁but ▁left ▁it ▁ 2 ▁years ▁later ▁after ▁the ▁death ▁of ▁its ▁chairman ▁M iko ▁T rip