The “ Discourse on the Arts and Sciences ” is not in itself of very great importance. Rousseau has given his opinion of it in the Confessions . “Full of warmth and force, it is wholly without logic or order; of all my works it is the weakest in argument and the least harmonious. But whatever gifts a man may be born with, he cannot learn the art of writing in a moment.” This criticism is just. The first Discourse neither is, nor attempts to be, a reasoned or a balanced production. It is the speech of an advocate, wholly one-sided and arbitrary, but so obviously and naively one-sided, that it is difficult for us to believe in its entire seriousness. At the most, it is only a rather brilliant but flimsy rhetorical effort, a sophistical improvisation, but not a serious contribution to thought. Yet it is certain that this declamation made Rousseau’s name, and established his position as a great writer in Parisian circles. D’Alembert even devoted the preface of the Encyclopaedia