It's about submission.
You can see why we argue about this all the time.
EDIT 2/11/18: I should mention that I have detailed some Terramagne examples of tribal membership and related issues in several poems. "Sheltered and True" features a discussion of Chippewa-Cree tribal currency and membership qualifications. "Lateral Moves" describes the manner in which Fireheart (who is primarily Inuit and Anishinaabeg) gains a brother-in-law.