Uğur-Çınar, MeralAçıkgöz, AliEsen, B.2024-03-212024-03-212023-04-021468-3857https://hdl.handle.net/11693/115070This article explores the prospects of and limits to political party change through a case study of the Republican People’s Party (Cumhuriyet Halk Partisi, CHP) under the leadership of Bülent Ecevit in the 1960s and 1970s. We demonstrate how the CHP, via a new generation of politicians led by Ecevit, gradually transformed its ideological programme and cadres in an effort to turn into a social democratic mass party, thereby maximizing its voter base in the 1973 and 1977 elections against the currents of the extant socio-political faultlines of Turkish politics. We claim that the potential for party change depends on the interplay between three factors: political entrepreneurs, the prevailing preferences and structures of a society, and the extant institutional setup. We conclude by discussing the implications of the findings for the prospects of party change as well as for the present and future trajectory of the CHP.EnglishCC BY 4.0 DEED (Attribution 4.0 International)https://creativecommons.org/licenses/by/4.0/Political party changeSocial cleavagesPolitical entrepreneurshipTurkeyCHPEcevitArticle10.1080/14683857.2023.21973071743-9639