This work examines biblically and convenantally the origin, goal, dynamics, and role that ethnicity has played in multi-ethnic contexts in missional, civil, and ecclesial spheres. Through a biblical-theological survey of the Old Testment, this work demonstrates that Yahweh mandates a centrifugal and centripetal missional force. The New Testament continues the promise of success among individuals and peoples with the Holy Spirit's power. In both the ecclesial and socio-political spheres covenantal ([con]federal) structures best balance human-unity and ethno-diversity. Both reflect God's triune nature. In Christ, thus, both visible structural identity and real self-determining, self-propagating, self-financing, and self-theologizing diversity in church and state are necessary.