Arabs are any group of people living in North Africa and the Middle East, from western Morocco, to Oman, and from Turkey in the north to Yemen and Sudan in the south. The history of the Arab peoples may be split into two major periods: that of the caliphates from 632 to 1924 and the era of modern Arab nationalism since 1924. The word caliph comes from an Arabic word meaning "successor." The caliphs were the successors of Muhammad. It was intended that Muslims would always live under a Muslim who ruled from the city of Medina, but this principle did not endure. From 632 to 732 the Arab tribes united to conquer the Middle East, North Africa, and Spain. Arab nationalism began to grow early in the 20th century, largely inspired by European ideas of nationhood. The essence of Arab nationalism was defined in 1938 as "all who are Arab in their language, culture, and loyalty." To consolidate Arab unity, the Arab League was founded in 1945. The members are Algeria, Bahrain, Djibouti, Iraq, Jordan, Kuwait, Lebanon, Libya, Mauritania, Morocco, Oman, Qatar, Saudi Arabia, Somalia, Sudan, Syria, Tunisia, the United Arab Emirates, Yemen, and the Palestine Liberation Organization. The cultural factors that best define the Arabic culture are language, food, territoriality, raw materials, clothing, structures, fine arts, kinship, marriage and family, social stratification, and religion. Arabic language is one of the world's most widely used languages. It is the official language of all the nations in the Arab League. There are two types of language though. They are the written and spoken forms. Colloquial, or spoken Arabic consists of dialects from Gulf, Iraqi, Levantine, Maghrebi, North Egyptian, Saudi Arabian, South Egyptian, Sudanese, and Tunisian. All of these could still be subdivided further, that's how diverse their language is. On the other hand, written Arabic serves as a standard of written language for all Arab nations. The form is a descendant of the language of Koran, the sacred book of the Islamic religion. Arabs use the spoken of the written form for radios and TV news broadcasts, in plays and in motion pictures. Arabic cuisine has roots in tent cookery. Nomadic tribes could use only transportable foods such as rice and dates or ambulatory stock such as sheep and camel in their recipes. Nowadays, beans, chickpeas, lentils, and rice are the most basic foods. They can be made into stew, or cooked with water, oil, vegetables, and seasonings to form various pastes. Sesame seed paste adds a special flavor to many dishes. Pastes are eaten by scooping up mouthfuls with thin Arab bread known to us as pita. In northern Africa, couscous which is a steamed cracked wheat, replaces rice as a basic food to some extent. Some form of yogurt accompanies each meal. Fresh and dried fruits are the main dessert. But sweet pastries such as baklava, which is made with honey and chopped nuts, are served on special occasions. Arab hospitality towards guests is second to none. Nowhere is it better expressed than in the age-old custom of serving freshly brewed coffee or mint tea to every guest, whether the gathering is business or social. The Arab world extends over five million square miles. There are three main regions in which the Arabs occupy: the Arabian Peninsula, northern Africa, and the Fertile Crescent (Iraq, Jordan, Lebanon, Syria, Palestine). Five million square miles may seem like a lot, but only a small portion of it is suitable for life. Much of it is hot and dry with vast areas of desert (Sahara, deserts of the Arabian Peninsula, Syrian Desert). Though, there are extremes of the other end like the snow capped mountains of the Grand Atlas in Morocco and the Lebanon Mountains. Vast majorities of the Arabs live in well-watered hilly regions, fertile river valleys, and humid coastal areas. The most densely settled areas are the Nile Valley and the Nile River Delta of Egypt, where one-quarter of the Arabs live. 55% of Arabs live in urban areas, 45% live in rural areas, and less than 1% live as nomads, and are only nomadic during the dry seasons. For centuries, Arab nations have been the crossroads of international commerce. Spices, textiles, and glass travel between Asia, Africa, and Europe. In the 1700's, due to expanding European commerce, led to an economic decline for the Arab world. In the 1900's, petroleum became one of the most important economic resources. Together, Arab lands hold about 3/5 of the world's reserves of oil. It has brought enormous prosperity to Arab governments and improvement in education, health care, and, transportation. Now, many of the countries are dependent on this export of petroleum as their main source of income. Arabs are quite unique when it comes to clothing. A traditional garb effectively conceals the outlines of the human figure, covering it from neck to foot. The reason is that of the hot climate and such garment would shield them from the sun. In the middle to upper class urban society, women may wear a veil over their faces. All women wear a floor length dress and a head scarf or hood. Though, western influence has caused many to wear Western style dresses or slacks, but rarely wear short or sleeveless dresses or let their hair hand free. Traditional men's clothing would be full-length robes or a cloak over some combination of shirt or vest. Many men also wear a turban, skullcap, or kaffiyeh (a loose folded head scarf held by a decorative cord called and agal). In South Arabia, men only wear a loincloth and walk about without any covering on the head. Women there wear no clothing above the waist, are unveiled, and wear no handkerchief. Most rural Arabs live in one or two story houses of brick, mud-brick, or stone. Mud-brick architecture takes a wide variety of forms, from simple rectangular structures to the beehive-shaped houses of northern Syria. Mud-brick is cheap and easy to use. It provides insulation against heat, and cold. However, many homes are being replaced with concrete and cinder blocks as building materials. Western-style apartment buildings are common in large cities. The distinctive many storied, mud-brick or stone buildings of Yemen and southern Saudi Arabia rank among the world's first "skyscrapers." Privacy is an important factor in much Arabic architecture, both urban and rural. Many homes or buildings open onto a private of semi-private central courtyard, while blank walls face the street. There are many forms of art within the Arab society. Poetry is a powerful source of identity within the Arab culture. It has been a public form to be recited and sung. Tribal poets use qualities such as courage, loyalty, beauty of their women, the speed of their horses, and the hardiness of their camels as themes to their poems. Modern poetry has a few new themes like: wine, hunting, philosophical reflections on the individual's role in life, and the glory of the ruler. Arabian music includes a wide range of styles, from urban pop to Sudanese swing, to the "belly dance" rhythms. What makes Arabian music unique is that its structure uses twenty modes that compares with the modes or scales of medieval Europe (24 quarter-tone intervals). Western music is based on eight-note sequences. Books, such as, Thousand and One Nights or better known as the Arabian Nights is a famous piece of Arabic literature written in the 1300's. Maqamahs are short witty narratives in which two characters visit cities throughout the Middle East. They observe the way people behave and play tricks on them. Arabs strongly value family ties and hospitality. Traditionally, Arabs place great importance on belonging to family or kinship groups. In some areas, family bonds are so strong that all members suffer "blackening of the face" after the dishonorable act of a member. The greatest dishonor that can befall a man is the sexual misconduct of his daughter or sister. Roots of this particular male honor go deep into the structure and dynamics of the Arab kinship group. Ties of blood, of patrilineal descent can never be severed and never weaken throughout a person's life. They stress hospitality as a source of honor, a host who richly entertained a guest raises the standing of the entire tribe (tribe: hundreds of families living together). Many children are raised by grandparents, aunts, uncles, and other relatives in addition to their parents. It is a common tradition for parents to arrange their children's marriages and often, partners are sought after within the clan (several related families) or tribe. Arab religion goes back a long way. Islam was founded in 622 by Muhammad, an Arab religious leader who lived in what is now Saudi Arabia. Muhammad is revered throughout the Islamic world as the Prophet of Allah. Islam united the Arab peoples and it inspired them to spread the new religion, after Muhammad's death in 632. Islam was the driving force behind the Arab invasion and conquest of Northern Africa. Today, more than 85% of the Arabs are Sunni Muslims, 10% are Shi'i Muslims, and less than 5% are Christians. Those that are Christians belong to various Eastern Orthodox, Roman Catholic, or Protestant Churches. Overall, the Arab culture is unique among others in this world. Their language is diverse and used throughout the world. They diet mostly on rice, fruits, pastes and yogurts at each meal. They occupy quite an astonishing amount of land in the Middle East and Africa. In those lands, they posses 3/5 of the world's reserves of oil. Men and women wear traditional clothing that covers their body from neck to foot. Women sometimes wear a veil. They live in mud-brick housings which are slowly being replaced by concrete and cinder block. Their culture emphasizes on poetry as the most important art of expression. Though, fiction is becoming more and more popular. Arabs have very strong family ties and which are never severed or weakened. Today, more than 90% of all Arabs are Muslims in faith. The Arabs are a very family oriented group of people that cannot be matched with any other in this world. The have existed for many years now, and hopefully, that will continue to be true.