I added an answer but then realized you are a college student and now I need to fill a character limit to edit/replace my high-school level answer whoops
Here's some of what I wrote but it doesn't really make since and it doesn't have any examples.
Many Native American groups in North America had highly complex leadership institutions. The common perception of "chieftains," while partly accurate, are not the entire story. Their would often be two "Chieftains" one for times of peace, negotiation and trade, and the other for waging war. These chieftains would not have full power over their "tribe" but instead they simply commanded much respect through their wisdom and integrity and who's words contained much weight with the rest of the tribe. During trade Native American's often had elaborate rituals and acts of reciprocity enforced by honor. There was a story of a French trader who traded 90 acres for his coat because the Native man was honor-bound to recognize the deal he made even though he was swindled.