Jean Jacques Rousseau was born at Geneva, June 28, 1712, the son of a watchmaker of French origin. His education was irregular, and though he tried many professions-including engraving, music, and teaching-he found it difficult to support himself in any of them. The discovery of his talent as a writer came with the winning of a prize offered by the Academy of Dijon for a discourse on the question, "Whether the progress of the sciences and of letters...