Why do we need a constitution? This question is of fundamental importance to scholars and thinkers alike, involved in tracing the genesis of constitutional regimes all over the world. Answering the question however, is not as easy as raising it. The notion of Social Contract has stood out as the most significant paradigms in Western philosophical and legal theory.  Locke provided that men are essentially free and equal, refuting the argument that men were naturally subject to the will of the monarch.  However, prior to Locke, the notion that the king and his subjects are equally subject to the law was firmly established by the grant of “Magna Carta” in 1215.  Magna Carta was a symbol of defence against the tyranny of the government making it the edifice of English liberties and the cornerstone of the British Constitution. 
Over the course of time, certain societies have realized that there is a need of certain normative regulations which not only bound the society but also its rulers. These norms in several nations often take the form of written constitutions and their primary purpose is usually check tyrannical abuse of power and oppression.