He was an amateur music expert, author of operas and botanist; he had served as a footman, a secretary and a family tutor. However, it is not for his numerous occupations and hobbies that he is famous, but for his books. The New Heloise, Emile and The Social Contract are considered his most important books. In them, Rousseau tells us about his social and political ideals. For the first time in political philosophy, he tried to explain the reasons of social inequality and considered the states as the result of a social contract. It was under the influence of Rousseau’s ideas that many democratic institutes emerged, for example, the referendum or the direct democracy that is still applied in his native Switzerland. He called the executive power “the brain of the state,” and the legislative power, “the heart of the state.” Even beyond his philosophical works, he spoke in aphorisms: according to him, only three things are needed for happiness: a good bank account, a good cook and a good digestion.