Answer:
To show how poorly they treated them.
Explanation:
Bartolomé De Las Casas was a Spanish Dominican friar who tried to defend the rights of Natives after Spaniards conquered The Americas. He was the first resident bishop of Chiapas, in southern Mexico and also the first one to be named Protector of the Indians. To achieve his goal, he wrote A Short Account of the Destruction of the Indies, where he narrated all kind of terrible things done by the Spaniards conquerors towards the Native people. By comparing them to the Romans during the conquest of the Iberian Peninsula, De Las Casas showed how the pattern was repeated but now the Spaniards took the role of the conquerors and they were acting like they were treated before.
A historian would use a calendar when he is trying to find the dates of when the event occurred, such as the dates of a battle, natural disaster, or how long a type of government has ruled.
hope this helps
3) Popular Sovereignty
4) Harriet Beecher Stowe (I don't know if this is the author you are looking for)
5) Uncle Tom's Cabin; or, Life Among the Lowly ( I don't know if this is the book you're looking for)
6) Free-Soil Party (Free Land)
7) Henry Clay
I hope I helped ^.^
