it ism ▁exhib ited ▁during ▁the ▁ 1 9 5 2 - 1 9 5 3 ▁" Do ctors ' ▁plot " ▁in ▁the ▁Soviet ▁Union . ▁He ▁left ▁the ▁Commun ist ▁Party ▁in ▁ 1 9 5 3 , ▁but ▁remained ▁Al th us ser ' s ▁friend ▁and ▁def ender ▁for ▁the ▁rest ▁of ▁his ▁life . ▁Although ▁failing ▁at ▁the ▁first ▁attempt ▁in ▁ 1 9 5 0 , ▁he ▁passed ▁his ▁agr ég ation ▁in ▁philosophy ▁on ▁the ▁second ▁try , ▁in ▁ 1 9 5 1 . ▁Ex c used ▁from ▁national ▁service ▁on ▁medical ▁grounds , ▁he ▁decided ▁to ▁start ▁a ▁doctor ate ▁at ▁the ▁F ond ation ▁Th iers ▁in ▁ 1 9 5 1 , ▁foc using ▁on ▁the ▁philosophy ▁of ▁psych ology , ▁but ▁he ▁rel in qu ished ▁it ▁after ▁only ▁one ▁year ▁in ▁ 1 9 5 2 . ▁ ▁Fou ca ult ▁was ▁also ▁interested ▁in ▁psych ology ▁and ▁he ▁attended ▁Daniel ▁Lag ache ' s ▁lect ures ▁at ▁the ▁University ▁of ▁Paris , ▁where ▁he ▁obtained ▁a ▁B A ▁( lic ence ) ▁in ▁Psych ology ▁in ▁ 1 9 4 9 ▁and ▁a ▁Di pl oma ▁in ▁Psych op ath ology ▁( Di pl ôme ▁de ▁psych op ath ologie ) ▁from ▁the ▁University ' s ▁Institute ▁of ▁Psych ology ▁( now ▁) ▁in ▁June ▁ 1 9 5 2 . ▁ ▁Early ▁Career ▁( 1 9 5 1 – 1 9 5 5 ) ▁ ▁Over ▁the ▁following