„It took from a hundred to a hundred and fifty or two hundred years for the astronomy of Kepler to become the astronomy of Newton and Laplace], and for the mechanics of [[Galileo to become the mechanics of d'Alembert and Lagrange. On the other hand, less than a century has elapsed between the publication of Adam Smith’s work and the contributions of Cournot, Gossen, Jevons, and myself.“
— Léon Walras
In : John Cunningham Wood (1993), Léon Walras: The life of Léon Walras and perspectives on his thought. Taylor & Francis, p. 32-33.