Several decades before Max Weber’s thesis (The Protestant Ethic and the Spirit of Capitalism), the economist Adolphe Blanqui, mutatis mutandis, contributes to a reflection that runs through the entire 19th century, according to which liberal economics and Protestant morality are the two sources of prosperity. The analysis, carried out according to an approach that is not very popular in economic history and a corpus that is not very familiar to the field of religious sciences, is focused on the correlation between religious intolerance (a sensitive value for Protestants, of whom Blanqui, whose case is discussed here, is a critical admirer), and economic intolerance (protectionism). Blanqui proposes a way out of this impasse by means of moral instruction within the framework of intimacy and industry.