Sources: Genesis 12, 15, 17, 22; ancient Near Eastern treaty literature; the Nuzi tablets.

The Abrahamic covenant is the founding act of the tradition this tree maps. God calls Abram from Ur of the Chaldeans (~2000–1800 BC) and makes three promises: land (Canaan), descendants (as numerous as stars), and blessing to all nations. These promises are sealed in three distinct covenant ceremonies — the covenant between the pieces (Gen 15, unconditional, God alone passes between the animal halves while Abram sleeps), the covenant of circumcision (Gen 17, with obligation and the sign of circumcision), and the Akedah ratification (Gen 22, after the binding of Isaac). The threefold structure matters: the covenant is repeated and deepened, not simply stated once. The ancient Near Eastern background is significant — the covenant form (suzerainty treaty between a great king and a vassal) was a well-known legal genre in the ancient world; the Nuzi tablets and Hittite treaty texts illuminate the social context. Circumcision as a covenant sign connects to Egyptian and Semitic practice. The promises here — land, descendants, blessing — define the scope of what this entire family tree is tracing: every branch derives from this moment and this promise.