Short answers, pulled from the story.
The Arab world is a group of countries mainly located in West Asia and North Africa. At its minimum it is defined as the 19 states where Arabs form at least a plurality of the population, and at its maximum it consists of the 22 members of the Arab League. The wider group adds the Comoros, Djibouti, and Somalia to the 19 plurality-Arab states.
The Arab world had a total population of 456 million inhabitants and a gross domestic product of $2.85 trillion as of 2021, according to the World Bank. The region is economically diverse and includes some of the wealthiest as well as poorest populations in the world.
The Mashriq is the eastern part of the Arab world, while the Maghreb is the western part. The Maghreb includes Algeria, Morocco, Tunisia, Libya, and Mauritania.
The Arab League was formed in 1945 to represent the interests of Arab people and especially to pursue the political unification of the Arab countries, a project known as Pan-Arabism. Its permanent headquarters are in Cairo, though they moved temporarily to Tunis during the 1980s after Egypt was expelled for signing the Camp David Accords.
The Arab League defines an Arab as a person whose language is Arabic, who lives in an Arab country, and who is in sympathy with the aspirations of the Arab people. This linguistic and political definition is generally dominant over genealogical considerations.
It is believed the Arab world holds approximately 46 percent of the world's total proven oil reserves and a quarter of the world's natural-gas reserves. Five Persian Gulf states, Saudi Arabia, Iraq, the UAE, Kuwait, and Qatar, are among the top ten petroleum or gas exporters worldwide.
Many modern borders of the Arab world were drawn by European imperial powers during the 19th and early 20th centuries, often by British and French draftsmen using maps and rulers. Efraim Halevy, a former Mossad director, recounted how Gertrude Bell drew the map between Iraq and Jordan on transparent paper, and when the paper shifted, considerable territory was added to the new Jordanians.