Racism literally means the belief that one human race is superior to another. But how great is the difference between the races really? Actually that question is impossible to answer, since there is only one human race - the differences between black and white people are so amazingly small, that they cannot be characterized as two races. Biologically there is a greater difference between two gorillas from the same jungle, than there is between all the people in the world. The main difference between black and white people is the amount of an insignificant chemical called melanin, which gives the skin a certain color.