Jean Jacques Rousseau (1912-78) is, perhaps, one of the most studied and well known political philosophers of the 18th century. He’s credited to have influenced the French Revolution and more notably development of modern political, sociological and educational thought.
`Common will`; he argued — that human beings are able to function with one common agenda shared among the people and their ruling class. Although he did less in explaining how this will be discovered and decided, he influenced a small niche of rulers to now fully determine the common will of all people — totalitarianism.