BLACK SOCIAL HISTORY : THE BLACK RULERS WHO SOLD BLACK PEOPLE TO EUROPEANS SLAVE TRADING SHIPS CAPTAINS :

There is y to one fact about African Rulers in the 14th century to the 19th century, the African Rulers in West African, Central Africa. East Africa right up to South West Africa, the Rulers and the decision making people in all these Kingdom were quite happy to sell there fellow Black People to White European Slave Traders with no worries or any form of guilt at all. What so different about Africa is that the Rulers in South Africa refuse to sell there people to Slave Traders on ships trying to buy slaves and when they were unsuccessful they moved on to there old friendly coast The Guinea Gulf Coast, The Ivory Coast, The Gold Coast and down to the Central African Coast to buy more slaves.
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Why did these Southern African Kings refuse to sell slaves to the slave trading ships Captain ?  they did not have a culture of slave trading in this part of the world, unlike West Africa were slave trading have gone on for thousand of years, so selling there own people to Slave Trading ships was like second nature to them and they could not understand that  what they were doing is so wrong, so morally wrong, that I believe they should be put on Trial in there absence by a World Court.