Jean-Jacques Rousseau political philosopher and educationalist, was born in Geneva, Switzerland. At the age of 13 he was apprenticed to an engraver. However, at 16 (in 1728) he left this trade to travel, but quickly become secretary and companion to Madame Louise de Warens in France. Twelve years older she was a mother figure, friend and lover. Under her patronage he developed a taste for music. He set himself up as a music teacher in Chambéry (1732). By 1742 he moved to Paris to became a close friend of David Diderot (1713-1784), who commissioned him to write articles on music for the French Encyclopédie.