Luba people
The development and evolution of the Luba Empire, and the life of Luba people therein, has been unclear. This is in part because the Luba people were an entirely oral tradition culture where knowledge and records were verbally preserved without a written script. The orthography for the Luba language, called "kiLuba", was invented in the 19th century, and thus early information about the Luba Empire has been derived from documents written by others usually hostile and only aware of the communities at the Luba Empire's border, or by the Luba people only in the late 19th-century and the 20th-century after the best decades of the Empire were long over. The later written texts suggest that the Luba people had developed sophisticated literary traditions around their concepts of good and evil, and integrated these concepts and their religious ideas into their legends about morality and people with power. For example, one legend relates to two kings, one called the red king "Nkongolo Mwamba" and other called the black king "Ilunga Mbidi Kiluwe". According to the Luba people's oral history,