He compares slavery to well-known horrors.
To explain that slavery is harmful to society.
It should be noted that the theme and the approach to slavery in the passage is that slavery was compared to well-known horrors.
It should be noted that a theme simply means the main idea that is in a story. It compares slavery was compared to well-known horrors.
Cugoanos purpose in this passage is to explain that slavery is harmful to society. He explained that slaves are denied their rights and freedoms in society. In the book, Cugoanos further explained that it's important for everyone to be treated fairly.
Learn more about themes on:
https://brainly.com/question/11600913