Government and tribal leadership of the Native Americans

In exploring pre-contact tribal governments of the Native Americans, please address the following questions for The Mississippi Band of Choctaws: Who led the tribe? How were decisions made? Which members in society had a voice in decision making? Are any remnants of the traditional ways of leadership evident in the tribe today? If so, what are they? Talk about the idea of collectivism and how it relates to traditional leadership and to the leadership in the Mississippi band of Choctaws (if it does).