In his preface to the Romanian-language edition of his 2003 book "Stalinism for All Seasons", Tismăneanu indicated that, starting in 1970, he became interested in critiques of Marxism-Leninism and the Romanian communist regime in particular, after reading banned works made available to him by various of his acquaintances (among others, writer Dumitru Țepeneag and his wife, translator Mona Țepeneag, as well as Ileana, the daughter of Communist Party dignitary Gheorghe Gaston Marin). He stated that, at the time, he was influenced by "Communism in Romania", an analytic and critical work by Romanian-born British political scientist Ghiță Ionescu, as well as by Marxist, Western Marxist, Democratic and Libertarian Socialist scholarship (among others, the ideas of Georg Lukács, Leszek Kołakowski, Leon Trotsky, Antonio Gramsci, and the Frankfurt School). According to Tismăneanu, his family background allowed him insight into the hidden aspects of Communist Party history, which was comparing with the ideological demands of the Ceauşescu regime, and especially with the latter's emphasis on nationalism.