There have been many wars in africa due to the fighting between the ?

Contrary to popular belief, Africa's civil wars are not due to its ethnic and religious diversity. Using recently developed models of the overall prevalence of civil wars in 161 countries between 1960-1999, we draw lessons with special reference to Africa, showing that the relatively higher prevalence of war in Africa is not due to the ethno-linguistic fragmentation of its countries, but rather to high levels of poverty, failed political institutions, and economic dependence on natural resources. We argue that the best and fastest strategy to reduce the prevalence of civil war in Africa and prevent future civil wars is to institute democratic reforms that effectively manage the challenges facing Africa's diverse societies. 

To solve their problems, mesopotamians used irrigation, a way of supplying water to an area of land. to irrigate their land, they dug out large storafe basins to hold water supplies these ditches brought water to the feilds. to protect their feilds from flooding, farmers built up the banks of the tigris and euphrates.hope ths !