Middle East lies at the juncture of Eurasia and Africa and of the Mediterranean Sea and the Indian Ocean. It is the birthplace and spiritual center of the Islam, Christianity, Judaism, Yezidi, and in Iran, Mithraism, Zoroastrianism, Manichaeism, and the Baha i Faith.Earliest civilizations, Mesopotamia and ancient Egypt, originated in the Fertile Crescent and Nile Valley regions of the ancient Near East, as well as the civilizations of the Levant, Persia, and Arabian Peninsula. The Middle East region was first unified under the Achaemenid Empire followed later by the Macedonian Empire. It would be the Arab Caliphates of the Middle Ages, however, that would first unify the Middle East as a distinct region and create the dominant ethnic identity that persists today. The Seljuk Empire would also later dominate the region..
The modern Middle East began after World War I, when the Ottoman Empire, which was allied with the defeated Central Powers, was partitioned into a number of separate nations. Other defining events in this transformation included the establishment of Israel in 1948 and the departure of European powers, notably Britain and France. They were supplanted in some part by the rising influence of the United States.
In the 20th century, the region's significant stocks of crude oil gave it new strategic and economic importance. Mass production of oil began around 1945, with Saudi Arabia, Iran, Kuwait, Iraq, and the United Arab Emirates having large quantities of oil. Estimated oil reserves, especially in Saudi Arabia and Iran, are some of the highest in the world, and the international oil cartel OPEC is dominated by Middle Eastern countries.
During the Cold War, the Middle East was a theater of ideological struggle between the two superpowers: the United States and the Soviet Union, as they competed to influence regional allies. Of course, besides the political reasons there was also the "ideological conflict" between the two systems.