Three centuries of the slave trade had taught Europeans that Africans were inferior, and that helped to justify imperialism in the minds of many Europeans. Even slave abolitionists contributed to this by arguing that Africans had to be "protected" from slavers; i.e. they couldn't take care of themselves.
'Common Sense’ transformed American politics by denouncing monarchy as being incompatible with liberty. It argued for independence from England and the creation of a democratic republic where people’s freedoms and liberties were respected. As a result, it encouraged common people to call for the creation of an egalitarian society
Answer:
it rejected scientific thinking