How did the addition of new western lands help contribute to the beginning of the civial war

i think it was because of how protected egyptian civilization was was which allowed them to evolve without much outside influence.

in which two ways were the northeast woodland indians and the southeast indians similar? both collaborated to form the iroquois confederacy. both cultivated the crops of corn, beans, and squash. both lived in rich environments of swamps and rivers. both lived in tree-bark dwellings called wigwams. both expected men to hunt, while women farmed.