If you are born in Spain and move to America. These people hold the highest positions in government
Mulattos
These are the people who were born in America from European parents.
Slaves and Natives
These are the people who have one Spanish parent and one native parent.
These are the people who had one Spanish parent and one African parent.
The Natives were originally used as slaves but the Spaniards brought diseases that killed off the Natives. So the Spaniards brought Africans to be their slaves.