Jean-Jacques Rousseau (1712-1778) was a swiss francophone polymath. He cultivated writing, philosophy, music, botany and naturalism. Although he was included within the Enlightenment, he showed many disagreements with the main representatives of this movement.
In his naturalistic side, Rousseau discovered in his later years his taste for botany, writing some books on this subject. As profound observer of man and his environment, he stated this famous quote: "There is always an open book for all eyes: nature."