This article aims at discussing the difference between conceptions of religion as propounded by Ludwig Feuerbach and Karl Marx, in the effort to understand why religion has once again become a current issue. Initially, the subjective foundation of religion in Feuerbach will be shown principally in his fundamental work, The Essence of Christianity, in which he makes it clear that Christianity places on its summit a subjective, personal, unlimited God who creates through "pure thinking" and "will" nature and man. Then, unlike Feuerbach's arguments, the social basis of religion in Marx will be shown. Although there is no systematic elaboration of religion in Marx's thought, there is an evaluation of it according to a social critique of the mat...