Peninsulares were born in Spain and then moved to the Spanish colonies. They could hold political office and make laws
Creoles were Spaniards who were born in colonial Latin America but because of that could not hold political office. However, they could hold military office. The Creoles had led revolutions in South America with their leader being Simon Bolivar.
Mestizos were people who had one Spanish parent and one native parent or two mestizo parents. A mestizo named Father Miguel Hidalgo led a revolution for independence in Mexico.
Mulattos were anybody with African blood.
At first, Native Americans were used as slaves but that failed because they didn't know how to farm. Instead, they used Africans as slaves. 10,000 slaves participated in The Haitian Revolution with their leader being Toussaint L'Overture.