Entrance of Islam in Africa; socio-political reading

For Years, among Researchers in the field of religion and Islamic Studies there has been disagreement about how Islam is spread and what are the effective elements on the Speed and Depth of its spread; viewpoints has been variable from power of early Islamic jihadist's sword to power and Intrinsic attraction of Islam. It must be understood that the question about how Islam enters to the area and how it spreads, is not only a historical study but also has the potentiality to show the strong points of Islam and the factors of its expansion in one region, the factors which caused the spread and depth of Islamic teachings and formed Islamic civilization and society. Regarding the question that, "Which social and political factors has been effective on spread and suppress of Islam in Africa?" and because of the importance of this study about cultural and religious activities, in this article I tried to mention the social and political factors of entrance and spread of Islam in Africa as well as the brief historical study about it.