A crucial turning point in the Thai political system and public administration was the Siamese Revolution or the Siamese Coup d’état in B.E.2475 (1932). It was a bloodless transition in which the system of government was changed from an absolute monarchy to a constitutional monarchy. The revolution resulted in the people of Siam being granted their first Constitution, which began by announcing that “the highest power in the land belongs to all people”. The Constitution basically stripped the King of all of his ancient powers for ruling the country. The Thai Political System exists within a framework of a parliamentary representative democracy and constitutional monarchy, whereby the King is the Head Of State, the Prime Minister is the head of government, and there is a multi-party system. Executive power is exercised by the government. Legislative power is vested in both the government and the two chambers of parliament—The House of Representatives and The Senate. The Judiciary is independent of the executive and the legislature. However, although this transition was vital, the government administrative structure and public administration paradigm of the government designed by King Chulalongkornwas not much revised. The revisions of administrative structure of the government were merely the sub-structure of the systems.