The Arab world stretches around 13 million km, from the Atlantic Ocean in the west to the Arabian Sea in the east, and from the Mediterranean Sea in the north to the Horn of Africa and the Indian Ocean in the southeast.Beyond the boundaries of the League of Arab States, Arabs can also be found in the global diaspora.Arabs have greatly influenced and contributed to diverse fields, notably the arts and architecture, language, philosophy, mythology, ethics, literature, politics, business, music, dance, cinema, medicine, science and technology Arabic epitaph of Imru' al-Qais, son of 'Amr, king of all the Arabs", inscribed in Nabataean script. Herodotus refers to the Arabs in the Sinai, southern Palestine, and the frankincense region (Southern Arabia).Other ancient Greek historians like Agatharchides, Diodorus Siculus and Strabo mention Arabs living in Mesopotamia (along the Euphrates), in Egypt (the Sinai and the Red Sea), southern Jordan (the Nabataeans), the Syrian steppe and in eastern Arabia (the people of Gerrha).In Biblical etymology, "Arab" (in Hebrew Arvi ) comes both from the desert origin of the Bedouins it originally described (Arava means wilderness).The root ʿ-r-b has several additional meanings in Semitic languages—including "west/sunset," "desert," "mingle," "mixed," "merchant," and "raven"—and are "comprehensible" with all of these having varying degrees of relevance to the emergence of the name.Inscriptions dating to the 6th century BCE in Yemen include the term "Arab".
Ibn Khaldun's Muqaddima distinguishes between sedentary Arabian Muslims who used to be nomadic, and Bedouin nomadic Arabs of the desert.
Arab Christians generally follow one of the Eastern Christian Churches, such as the Maronite, Coptic Orthodox, Greek Orthodox, Greek Catholic or Chaldean churches. The earliest documented use of the word "Arab" to refer to a people appears in the Kurkh Monoliths, an Akkadian language record of the ninth century BCE Assyrian conquest of Aram, which referred to Bedouins of the Arabian Peninsula under King Gindibu, who fought as part of a coalition opposed to Assyria.
Other smaller minority religions are also followed, such as the Bahá'í Faith, Sabianism, Bábism and Mandaeism. Listed among the booty captured by the army of king Shalmaneser III of Assyria in the Battle of Qarqar are 1000 camels of "Gi-in-di-bu'u the ar-ba-a-a" or "[the man] Gindibu belonging to the Arab (ar-ba-a-a being an adjectival nisba of the noun ʿarab The oldest surviving indication of an Arab national identity is an inscription made in an archaic form of Arabic in 328 using the Nabataean alphabet, which refers to Imru' al-Qays ibn 'Amr as "King of all the Arabs".
Among the most prominent civilizations was Dilmun, which arose around the 4th millennium BCE and lasted to 538 BCE, and Thamud, which arose around the 1st millennium BCE and lasted to about 300 CE.
Additionally, from the beginning of the first millennium BCE, Southern Arabia was the home to a number of kingdoms, such as the Sabaean kingdom, and the coastal areas of Eastern Arabia were controlled by the Parthian and Sassanians from 300 BCE.