The Sumerians were the first people to migrate to Mesopotamia, they created a great civilization. Beginning around 5,500 years ago, the Sumerians built cities along the rivers in Lower Mesopotamia, specialized, cooperated, and made many advances in technology. The wheel, plow, and writing (a system which we call cuneiform) are examples of their achievements.
1 In a Parliamentary System, the head of state is usually a different person than the head of government (not in every country). 2  The HOG is often vested with more official power, but holds that position for a relatively short time.
In a Parliamentary system the legislative and the executive department of the government are very closely related and are interdependent for the performance of governmental functions.he Cabinet or the Council of Ministers enjoys the real powers. The Prime Minister is the real head of government. All the ministers are also all members of the parliament and are responsible to it for their acts and policies.