History Of Saudi Arabia

The modern state of Saudi Arabia was founded in 1932 with the union of the kingdoms of the Hejaz and Nejd. Although the territory within the Kingdom of Saudi Arabia's boundaries is largely arid desert or rocky infertile terrain – home for much of its history to tribal nomadic societies with only rudimentary state structures – it has twice in world history had a global impact. The first was in the 7th century when it became the cradle of Islam. The second was from the mid-20th century when the discovery of vast oil deposits propelled it into a key economic and geo-political role. At other times, the region existed in relative obscurity and isolation, although from the 7th century the cities of Mecca and Medina had the highest spiritual significance for the Islamic world, Mecca being the destination for the Hajj annual pilgrimage.
There is evidence that human habitation in the Arabian peninsula dates back to about 15,000 to 20,000 years ago. However, the harsh climate historically prevented much settlement. In pre-Islamic Arabia, apart from a small number of urban trading settlements, such as Mecca and Medina, located in the Hejaz in the west of the peninsula, most of what was to become Saudi Arabia was populated by nomadic tribal societies or uninhabitable desert. Archaeology, however, revealed some early settled cultures: the Dilmun on the Persian Gulf, and Thamud north of the Hejaz. The earliest known events in Arabian history are migrations from the peninsula into neighbouring areas.