What is the Origin of the Inequality among Mankind; and whether such Inequality is authorized by the Law of Nature? I conceive two species of inequality among men; one which I call natural, or physical inequality, because it is established by nature, and consists in the difference of age, health, bodily strength, and the qualities of the mind, or of the soul; the other which may be termed moral, or political inequality, because it depends on a kind of convention, and is established, or at least authorized, by the common consent of mankind. This species of inequality consists in the different privileges, which some men enjoy, to the prejudice of others, such as that of being richer, more honoured, more powerful, and even that of exacting obedience from them. Jean-Jacques Rousseau was a Genevan philosopher, writer, and composer of 18th-century Romanticism of French expression. His political philosophy influenced the French Revolution as well as the overall development of modern political, sociological and educational thought.