People of African descent who migrated from their “homelands” constituted, and still constitute, important forces in many African cultures outside of their “homelands” as well as in many other cultures outside of the African continent. Historically, the migration of people of African descent from their “homelands” is mainly linked to the pre-20th century Muslim or Asian trade and the Atlantic trade as well as to the post 1980 globalization of the capitalist system. Even before the post 1980 globalization of the capitalist system deepened the crises in African states and resulted in the migration of skilled and unskilled Africans to places like the United States, Canada, Britain and the Middle East, some scholars had written on people of African descent in several parts of the world. Although the earliest among those who wrote on the subject before the 1980s did not employ the term “African diaspora” in their analysis, an increasing number of scholars who wrote after 1950 have used the term in question in their study of people of African descent in various parts of the world. The relevant literature written after 1950 features disagreement over the meaning of the concept “African diaspora” and point to diverse methodologies that are useful in working on the subject. This particular literature can be divided into three broad categories: works that deal with the Old African diaspora, works that deal with the New African diaspora and works that deal with both the Old and New African diasporas. The historiography shows that works situated in all of these three categories mainly offer competing view over three fundamental questions: why did Africans leave their “homelands” and settle elsewhere? What was the impact of this process on the societies they left? How did Africans who left their “homelands” integrate into their host societies or preserve their unique identities; or, more broadly, what was the impact of their arrival on the host society they entered? Despite the rapid strides that have been made since the 1960s in regard to addressing these questions or in regards to the scholarly study of the African diasporas in general, there is still no firm definition of the term “African diaspora.” Moreover, there are still other gaps in the scholarly knowledge of the subject.