This weekend I read Por qué soy marxista y otras confesiones, by Alfons Carles Comín (1933-1980), which Laia publishing house published exactly 47 years ago, in June 1979 (in reality it is a collection of articles, some of which had been published several years earlier). To better adapt to the ideological fashion of that time, the title is misleading. In reality, it should have been called Por qué soy cristiano-marxista, as it literally appears in the first sentence of Comín's essay; the year '79, however, would have been quite problematic: fashions, all of them, generate their corresponding antibodies. Although it is unfindable, I recommend this book. It formulates one of the most nuanced and historically informed approaches to the relationship between Christianity and Marxism in late Francoist Catalonia, and in the European context of the post-Vatican II Council. It should be said that other authors of the same period were neither so well informed nor so nuanced. Comín's approach is born of a double commitment: to the workers' tradition and to Christianity lived as a radical ethical demand. This perspective allows him to read Marxism not as a substitution of faith, but as a historical hermeneutics capable of revealing the structures of oppression that Christianity, in its institutional version, had often ignored or even legitimized. Comín did not precisely come from a working-class family, let alone a Marxist one, but he was Catholic. On page 22 he states that Catalonia has suffered ""an attempt at authentic ethnic genocide". No small matter.