Abstract

 The research deals with the study of the history of the Doss tribe, which played an important role in the history of the Arabian Peninsula, whether it was before or after Islam.  The research came in an introduction, four sections and a conclusion. The first section dealt with the name of the Doss tribe, its lineage and Islam, the second section dealt with its economic, religious and social conditions, and the third section included a study of its relations with Arab tribes and with the Persians on the political and social levels, while the fourth and final section touched  to the role of the Doss tribe in the Islamic conquests during the era of the Prophet and the Khilafa Rashida. As for the conclusion, it came out by mentioning the most important findings of the research.