During the Vietnam war, the country is separated hawks and doves. It is because we couldn't defend against Vietnam.
In this quotation from 1796, George Washington was warning America that having power would always lead to despotism unless there are different departments that restrict the head authority and balance the control of the government, instead of having the whole management of the country relying in only one person.
So slavery and trapping of other tribes was already a thing in Africa before slavery went to the U.S. Because the U.S started doing it, tribes now wanted to enslave as many people as they could to get money from trades that would se d slaves over. This meant tribes fell apart, cultures were lost, and people were hunted down to sell as slaves.
It was used to help regulate interactions between the settlers and the natives.