The Arabian Peninsula, the birthplace of Islam is one of the hottest and driest regions of the world, mainly from the desert. Since ancient tribes of the nomadic race had populated the region. Are considered the descendants of Shem son of Noah, his third call Semites. Over the centuries theses Semitic people have in the Fertile Crescent and migrated the existing cultures were assimilated.
Arabia was divided into tribes and cities. Each city had gods and goddesses. Once a year the tribes and cities in the Saudi city of Mecca during the hajj as an event to meet known. In Mecca, the Kaaba (cube), a cube-shaped building housed 360 idols largest of all the tribes of Arabia. The Kaaba was the center of religious life of Arabia. Here are all the warring tribes would put aside their differences, since around the Kaba. From the Kaaba the other shrines outside of Mecca during those five days would be a religious event. The Hajj was a tradition that the Arabs of the peninsula remembered back hundreds of years.
In the sixth century AD, in the north of the Arabian Peninsula two great powers were locked in a struggle for power up and down. The Christian Byzantine Empire was the successor of the Roman Empire of the North West and control of the Mediterranean, North Africa and the lands of Palestine. To the northeast lay the Zoroastrian Persian Empire. Both the Byzantine and Persian empires had client Arab tribes allied to the cause of trade and conquest.
The Arabian Peninsula was a land of refuge for those fleeing from these two empires. Christian heretical sects like the Nestorians, and Jewish tribes escaping the oppressive Byzantines found refuge in the deserts of protection and the cities of the Iberian Peninsula.