  In 1749, while walking to Vincennes to visit the briefly-imprisoned Diderot, Rousseau came across a newspaper announcement of an essay competition organized by the Academy of Dijon. The Academy sought submissions on the theme of whether the development of the arts and sciences had improved or corrupted public morals. Rousseau later claimed that he then and there experienced an epiphany which included the thought, central to his world view, that humankind is good by nature but is corrupted by society. Rousseau entered his Discourse on the Sciences and Arts (conventionally known as the First Discourse) for the competition and won first prize with his contrarian thesis that social development, including of the arts and sciences, is corrosive of both civic virtue and individual moral character. The Discourse was published in 1750 and is mainly important because Rousseau used it to introduce themes that he then developed further in his later work, especially the natural virtue of the ordinary person and the moral corruption fostered by the urge to distinction and excellence. The First Discourse made Rousseau famous and provoked a series of responses to which he in turn replied.