Sudan's population is one of the most diverse on the African continent.Within two distinct major cultures -Arab and Black Africans-there are hundreds of ethnic and tribal subdivisins and language groups, which make effective collaboration among them a major political challenge.
The Northern states cover most of the Sudan and include most of the urban centers.Most of the 22 million Sudanese who live in this region are Arabic-speaking Muslims, though the majority also uses a non-Arabic mother tongue.
The southern region has a population of around 6 million and a predominantly rural, subsistence economy. They have many more tribal groups of which Dinka and Nuer are prominent. The southern sudan and western Darfur were affected by genocide. In 2008 Sudan's population reached an estimated 40.2 million.