Between Saint-Simon death in 1825 and the opening of the Suez Canal in 1869, saint-simonians have been engaged in a variety of entrepreneurial projects. Willing to put an end to the French Revolution and to develop a new humanism, they have initiated both large capitalist ventures of public interest and workers’ cooperatives. Mainstream economic analysis often puts aside the role of institutions and ideologies in economic development movements. Saint-Simon and his followers anticipated the central role of firm as a key capitalist institution. Based on a physiological framework they viewed corporation as a living organism inscribed in a natural and social evolution, which raises the question of the nature and the limits of the firm in the pe...