The makers of the constitution place filters because they thought a man was not smart enough and the founding fathers believed that too much direct majority rule could be a possible hindrance to the rights of the minority groups, so they placed the electoral college and direct election of United States into the Constitution.
The division of countries caused by the European powers' arbitrary boundaries is one of the major causes of post-colonial violence in Africa. These boundaries were drawn with little to no regard for the people who live within them or their heritage.