During the first century of the Slave trade between West Africa and the New World, there was an increasing shift in the attitude towards people of different races and color.
Since the colonist were White themselves and were able to control a large population of people with a darker skin tone, a belief in the superiority of the White skin started to develop.
Black and Brown skinned people were seen as slaves, people of less importance and someone who is to be controlled for life.
A regid distinction between the White and Black people developed in North America and things increasingly became difficult for people of different races.