Sociologists and historians of science, such as Richard Whitley and Stephen Hilgartner, identified a culturally dominant discourse of science popularization in the broader society In this dominant view, a clear distinction is maintained between scientific knowledge and popularized knowledge. Popularization of science is seen as the process of transmitting real science to a lay public. This discourse Oil Science popularization was criticized by Whitley and Hilgartner as an inadequate simplification. Yet, the battered traditional model of popularization remains remarkably resistant to these theoretical attacks. In this paper I will argue, based Oil research Of the Output of the Belgian economist Gustave de Molinari (1819-1912), and more specifically, his opinion Oil the role of government in economic life, that the boundary between science and popularization in political economy is not clear and that the status Of Scientists fluctuates over time and in different contexts. It is therefore impossible for historians or economists to distinguish science from popularization based on the essential characteristics or intrinsic quality of the work. De Molinari's ideas are followed through the different media of science and journalism. Although de Molinari himself differentiated between his scientific and "popular" work, the boundary between science and popularization proves to be highly permeable, in both directions.