The history of Saudi Arabia in its current form as a state began with its foundation in 1932 by Abdulaziz Al Saud, although the human history of the region extends as far as 20,000 years ago. The region has had a global impact twice in world history:
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 Muslim world, with Mecca becoming the destination for the Hajj pilgrimage, an obligation, at least once in a believer's lifetime, if at all possible.
For much of the region's history a patchwork of tribal rulers controlled most of the area. The Al Saud (the Saudi royal family) emerged as minor tribal rulers in Najd in central Arabia. From the mid-18th century, imbued with the religious zeal of the Wahhabi Islamic movement, they became aggressively expansionist. Over the following 150 years, the extent of the Al Saud territory fluctuated. However, between 1902 and 1927, the Al Saud leader, Abdulaziz, carried out a series of wars of conquest which resulted in his establishing the Kingdom of Saudi Arabia in 1932.
From 1932 until his death in 1953, Abdulaziz ruled Saudi Arabia as an absolute monarchy. Thereafter six of his sons in succession have reigned over the kingdom:
There is evidence that human habitation in the Arabian Peninsula dates back to about 63,000 years ago.
Archaeology has revealed some early settled civilizations: the Dilmun civilization on the east of the Arabian Peninsula, Thamud north of the Hejaz, and Kindah kingdom and Al-Magar civilization in the central of Arabian Peninsula. The earliest known events in Arabian history are migrations from the peninsula into neighbouring areas.
There is also evidence from Timna (Israel) and Tell el-Kheleifeh (Jordan) that the local Qurayya/Midianite pottery originated within the Hejaz region of NW Saudi Arabia, which suggests that the biblical Midianites originally came from the Hejaz region of NW Saudi Arabia before expanding into Jordan and Southern Palestine.