This study aims to demonstrate the Relationship Between Slavery and Racism in terms of how slavery causes racism in four areas; first, the Greek civilisation; second, the son of Noah “Ham” and slavery; third, the scientific movement and racism; and fourth, the slave trade. This study uses inductive, historical, and critical methods to discuss the four headings stated above. The most important conclusion is that the division into those who were Greeks and those who were non-Greeks (barbarians) had led into a belief in Greek superiority emphasised that, and being a member of a superior group gives a right of doing violence towards barbarians. Second, the story of Ham was an excuse for enslaving black Africans and linking blackness with slavery, while this relationship was not known until the seventeenth century. The story supports the idea of discriminating against black slaves and linking colour with social class and prepares Europeans to accept the modern practice of slavery in the Atlantic slave trade. Third, scientists participated in provoking racism to value the European race over other races, considering it as a central race. Forth, The trade slave was the only alternative to a search for cheap labour in order to cover the gap in supply and stem this increase.