Negro is a non-derogatory racial description used to reference Black people in and from Africa.
Around 1442 the Portuguese first arrived in Southern Africa while trying to find a sea route to India. The word negro, literally meaning 'black', was used by the Spanish and Portuguese as a description refering to black Africans that they encountered. From the 18th century onwards the world's races were intensively studied and examined and the word negro became the accepted description of the Black African race wherever they resided. Until the late 1960s negro was considered to be the correct English-language term for such people everywhere. It was, for instance, used in all official USA government documentation until almost the end of the 20th century. However since the 1990s Liberals and cultural Marxists/socialists and the Human Rights industry decided it was a derogatory term and it has become less used in politically correct circles.