Jean-Jacques Rousseau was a Genevan philosophe, writer, and composer. His political philosophy influenced the progress of the Age of Enlightenment throughout Europe, as well as aspects of the French Revolution and the development of modern political, economic, and educational thought. June 28, 1712 – July 2, 1778; died at 66. Alive at the same time as Isaac Newton, Johann Wolfgang von Goethe, George Washington, Wolfgang Amadeus Mozart, and Johann Sebastian Bach. Wiki link