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.
What are the main differences between the parliamentary system of government versus the presidential system? For example, Germany's parliamentary system versus Mexico's presidential system.ottom line is, if you believe that government should have more checks and balances, then a Presidential system will give you that. If you believe that it should have the power to enact laws quickly, then you should go for a Parliamentary system.