The term black people usually refers to a racial group of humans with skin colors that range from light brown to nearly black. It also has been used to categorize a number of diverse populations into a common group. Some definitions of the term include only people of relatively recent Sub Saharan African descent (see African diaspora). Among the members of this group, brown skin is most often accompanied by the expression of natural afro-hair texture. Other definitions of the term "black people" extend to any of the populations characterized by dark skin, a definition that also includes certain populations in Oceania and Southeast Asia..

Physiological traits

Dark skin

Further information: Human skin color

The evolution of dark skin is linked intrinsically to the loss of body hair in humans. By 1.2 million years ago, all people having descendants today had the same receptor protein of today's Africans; their skin was dark, and the intense sun killed off the progeny with any lighter skin that resulted from mutational variation in the receptor protein. This is significantly earlier than the speciation of Homo sapiens from Homo erectus some 250,000 years ago.

Dark skin helps protect against skin cancer that develops as a result of ultraviolet light radiation, causing mutations in the skin. Furthermore, dark skin prevents an essential B vitamin, folate, from being destroyed. Therefore, in the absence of modern medicine and diet, a person with dark skin in the tropics would live longer, be healthier and likelier to reproduce than a person with light skin. White Australians have some of the highest rates of skin cancer as evidence of this expectation. Conversely, as dark skin prevents sunlight from penetrating the skin it hinders the production of vitamin D 3 . Hence when humans migrated to less sun-intensive regions in the north, low vitamin D 3 levels became a problem and lighter skin colors started appearing. White people of Europe, who have low levels of melanin, naturally have an almost colorless skin pigmentation, especially when untanned. This low level of pigmentation allows the blood vessels to become visible and gives the characteristic pale pink color of white people. The loss of melanin in white people is now thought to have been caused by a mutation in just one letter out of 3.1 billion letters of DNA.

Hair

Main article: natural afro-hair

The texture of hair in people of Sub-Saharan African ancestry is noticeably different from that of Eurasian populations, as was already noted by Herodotus, who described the peoples of Libya (the "western Ethiopians") as wooly-haired .

Such "afro-hair" texture is denser than its straight counterparts. Due to this, it is often referred to as 'thick', 'bushy', or 'woolly'. For several reasons, possibly including its relatively flat cross section (among other factors), this hair type conveys a dry or matte appearance. It is also very coarse, and its unique shape renders it very prone to breakage when combed or brushed.

The specific characteristics of the natural afro-hair form are unique among all mammals. The texture likely predates the evolution of dark skin. It evolved when, as pre-human Australopithecines lost most of their fur to enable perspiration, the need to protect the newly exposed pale skin underneath this body hair was crucial(see in light of Rogers et al., 2004 and Harding et al., 2000). The trait ceased to be essential to survival at the equator upon the evolution of hairless dark skin. Yet it has continued to be expressed vestigially among most Melanesians, Andaman Islanders, and sub-Saharan Africans.

Sub-Saharan Africa

Further information: Demographics of Africa

Sub-Saharan Africa is a common if imprecise term that encompasses African countries located south of the Sahara Desert. It is commonly used to differentiate the region culturally, ecologically, politically and, more controversially, racially, from North Africa, which has historically been part of the Mediterranean sphere. Because the indigenous people of this region are primarily dark-skinned, it is alternatively called "Black Africa". Some criticize the use of the term, because, having become in many quarters synonymous with Black Africa , it can leave the mistaken impression that there are not indigenous Black populations in North Africa. Furthermore, the Sahara cuts across countries such as Mauritania, Mali, Niger, Chad, and Sudan, leaving some parts of them in North Africa and some in sub-Saharan Africa.

Owen 'Alik Shahadah argues that the term sub-Saharan Africa has racist overtones:

Sub-Saharan Africa is a racist byword for "primitive", a place which has escaped advancement. Hence, we see statements like “no written languages exist in Sub-Saharan Africa.” “Ancient Egypt was not a Sub-Saharan African civilization.” Sub-Sahara serves as an exclusion, which moves, jumps and slides around to suit negative generalization of Africa.

However, some Black Africans prefer to be culturally distinguished from those who live in the north of the continent.

Cultural ideas of a black race

South Africa

In South Africa during the apartheid era, the population was classified into four groups: Black , White , Asian (mostly Indian), and Coloured . The Coloured group included people of mixed Bantu, Khoisan, and European descent (with some Malay ancestry, especially in the Western Cape). The Coloured definition occupied an intermediary position between the Black and White definitions in South Africa.

The apartheid bureaucracy devised complex (and often arbitrary) criteria in the Population Registration Act to determine who belonged in which group. Minor officials administered tests to enforce the classifications. When it was unclear from a person's physical appearance whether a person was to be considered Colored or Black, the "pencil test" was employed. This involved inserting a pencil in a person's hair to determine if the hair was kinky enough for the pencil to get stuck.

During the apartheid era, those classed as 'Coloured' were oppressed and discriminated against. However, they did have limited rights and overall had slightly better socioeconomic conditions than those classed as 'Black'. In the post-apartheid era the government's policies of affirmative action have favored 'Blacks' over 'Coloureds'. Some South Africans categorized as 'Black' openly state that 'Coloureds' did not suffer as much as they did during apartheid. The popular saying by 'Coloured' South Africans to illustrate this dilemma is:

Not white enough under apartheid and not black enough under the ANC (African National Congress)

Other than by appearance, 'Coloureds' can be distinguished from 'Blacks' by language. Most speak Afrikaans or English as a first language, as opposed to Bantu languages such as Zulu or Xhosa. They also tend to have more European-sounding names than Bantu names.

In 2008, the High Court in South Africa has ruled that Chinese South Africans are to be reclassified as Black people.

In the Middle East

Arab world

See also: Afro-Arab

Black African and Near Eastern peoples have interacted since prehistoric times. Some historians estimate that as many as 14 million black slaves crossed the Red Sea, Indian Ocean, and Sahara Desert in the Arab slave trade from 650 to 1900 CE. The Moroccan Sultan Moulay Ismail "the Bloodthirsty" (1672-1727) raised a corps of 150,000 black slaves, called his Black Guard, who coerced the country into submission.

The Afro-Asiatic languages, which include Semitic languages such as Arabic and Hebrew, are believed by some scholars to have originated in Ethiopia. This is because the region has very diverse language groups in close geographic proximity, often considered a telltale sign for a linguistic geographic origin.

In more recent times, about 1000 CE, interactions between black people and Arabs resulted in the incorporation of extensive Arabic vocabulary into Swahili, which became a useful lingua franca for merchants. Some of this linguistic exchange occurred as part of the slave trade; the history of Islam and slavery shows that the major juristic schools traditionally accepted the institution of slavery. As a result, Arab influence spread along the east coast of Africa and to some extent into the interior (see East Africa). Timbuktu was a trading outpost that linked west Africa with Berber, Arab, and Jewish traders throughout the Arab World. As a result of these interactions many Arab people in the Middle East have black ancestry and many black people on the east coast of Africa and along the Sahara have Arab ancestry.

According to Dr. Carlos Moore, resident scholar at Brazil's Universidade do Estado da Bahia, Afro-multiracials in the Arab world self-identify in ways that resemble Latin America. He claims that black-looking Arabs, much like black-looking Latin Americans, consider themselves white because they have some distant white ancestry.

Moore also claims that a film about Egyptian President Anwar Sadat had to be canceled when Sadat discovered that an African-American had been c

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