ABSTRACT The schoolteacher and poet Hilja Pärssinen (1876–1935) was the most influential and internationally best-known female socialist in Finland before the Finnish Civil War (1918). She was a member of the Finnish Parliament, the leader of the Finnish Social Democratic Women’s Movement, and the most prominent ideologue of the Finnish Social Democratic Party’s (SDP) welfare programme. For instance, Pärssinen promoted paid maternity leave, public daycare, legalised abortion, and compulsory education with free meals and school supplies. Historians have acknowledged Pärssinen’s leading role as the architect of Finnish socialist welfare, but also pointed out that she was an aggressive opponent of the Evangelical Lutheran church. However, the studies have mainly failed to note that instead of rejecting religion itself, Pärssinen claimed all the reforms demanded by socialists were based on Christianity. Finnish scholars have argued—mainly based on writings by the party male elite—that the SDP rejected religion and adopted secular/antireligious ideology at the beginning of the twentieth century. I argue that this paradigm is based on an oversimplified and gendered interpretation. This paper will show that shifting the perspective from male socialist leaders to female ideologues can change and widen the comprehension of the history of socialism drastically.