This paper puts forward some reflections on the fundamental issues of Saint-Simon\u2019s vision of future society and on the event of Cr\ue9dit Mobilier, a case of actual application of the theory, judged by Marx as a new industrial feudalism; this in order to try to answer the question on how Saint-simonism and socialism relate. The dialectical scheme of history and the rejection of the free competitive market as the only institution to coordinate the economic agents can explain the admiration of Engels and the respect of Marx. On the other hand, Saint-Simon never claims for the real emancipation of the working class: in his theory economic and political hierarchy would be dominated by the top management of a big private enterprise. His ut...