Enlightenment
He was a 17th century English philosopher whose book "Leviathan" (1651) helped to clarify both the "social contract theory" of government.
Hobbes
He was a French Enlightenment philosopher and author of The Social Contract, which became one of the most influential works of political philosophy in the Western tradition.
Rousseau
This is an agreement between the governed and the government defining and limiting the rights and duties of each.
Social Contract Theory
This was a British philosopher who argued that governments only purpose was to protect man's natural rights.
locke
He was a French philosopher who developed a number of political theories in his Spirit of the Laws.
Montesquieu
This is a political theory that individuals have privileges that no government can deny.
Natural Rights
This is the belief that the ultimate power of the government rests on the will of the people themselves.
Popular Sovereignty
He was an 18th century Enlightenment philosopher from France whose is known for both his prose (1759's "Candide") and his defense of civil liberties.
Voltaire