Freud sent a copy of The Future of an Illusion to his friend Romain Rolland . While Rolland generally agreed with Freud's assessment of religion, he questioned whether Freud had discovered the true source of religious sentiment, which he ascribed to an "oceanic" feeling .  The psychiatrist Carl Jung , the founder of analytical psychology , wrote in Symbols of Transformation that The Future of an Illusion "gives the best possible account" of Freud's earlier views, "which move within the confines of the outmoded rationalism and scientific materialism of the late nineteenth century."  The critic Harold Bloom , writing in The American Religion (1992), calls The Future of an Illusion "one of the great failures of religious criticism." Bloom believes that Freud underestimated religion and was therefore unable to criticize it effectively.  Today, some scholars see Freud's arguments as a manifestation of the genetic fallacy , in which a belief is considered false or inverifiable based on its origin.