Black people (seen both capitalized and with lowercase "b") is a term used in certain countries, often in socially based systems of racial classification or of ethnicity, to describe persons who are perceived to be dark-skinned compared to other given populations.
As such, the meaning of the expression varies widely both between and within societies, and depends significantly on context.
The government was accused of "deftly manipulat(ing) Arab solidarity" to carry out policies of apartheid and ethnic cleansing.
In the Sahara, the native Tuareg Berber populations kept "Negro" slaves.
The people of the region were noted in Classical literature as Mauri, which was subsequently rendered as Moors in English.