Were tales in Genesis Devised to support the Davidic Monarchy?

In attempting to date the various documents now incorporated in the Torah, scholars consider such questions as the author’s purpose and original audience. Why and for whom specifically did he write? If a case can be made for a particular period or set of circumstances in Israel’s history that fits the writer’s presumed intent and recipients, this evidence can help pinpoint the probable time of composition.

Although many elements in the Torah suggest that it assumed its final form after the Babylonian exile in the sixth century BCE, parts of the Genesis narrative seem particularly relevant to the political situation of David and Solomon (10th century BCE).

According to some proponents of the theory, many stories in Genesis function to justify or validate the actions and policies of David, Solomon, and their heirs. If this assumption is correct, some of the tales about Israel’s ancestors, paralleling events in the reigns of Davidic rulers, may have been shaped to support the Davidic monarchy long before the Babylonians brought the dynasty to an end (587 BCE).

Story in Genesis / Report about Davidic Dynasty
God promises Abraham that kings shall come from you (Gen 17:6). / David establishes a monarchy despite opposition from tribal leaders who insist that only Yahweh is Israel’s king (1 Sam 8:4-32).
Yahweh Promises Abraham the region extending from “the river of Egypt to … the river Euphrates” (Gen 15:18). / David extends Israel’s borders to include the territory promised to Abraham (2 Sam 8:3; 1 Kings 4:21; 8:65).
One of the four rivers of Eden is Gihon (Gen 2:13).. / David captures Jerusalem—a Canaanite stronghold—and centers his capital around the Gihon spring, a water source reminiscent of humanity’s original paradise home.
Genesis emphasizes the close kinship of Israel and its future neighboring states; Jacob’s twin brother Esau “is Edom” (36:1); Ammon and Moab are descended from Abraham’s nephew Lot (Gen. 19:36-38). / David incorporates the states of Edom, Moab, and Ammon into his kingdom, making them part of the Israelite “family” (2 Sam 8).
Yahweh declares that Esau (Edom) will “serve” Jacob (Israel) (Gen 25:23). / “All the Edomites became David’s servants” (2 Sam. 8:14; 1 Kings 11:14-17).
Abraham prepares to sacrifice his son Isaac on MountMoriah (Gen 24:23), considered the future site of Jerusalem. / Solomon erects Yahweh’s Temple on the traditional site of Isaac’s “binding,” the only place Israel’s required sacrifices to Yahweh are permitted (Deut 12; 1 Kings 8).
Through Genesis, God favors younger sons, preferring Abel to Cain, Jacob to Esau, Joseph to his older brothers, and Ephraim to Manasseh. / God favors David over his older brothers; grants the succession to one of David’s youngest sons, Solomon (1 Sam 16:6-13; 1 Kings 1-2).
Judah, eponymous founder of David’s tribe, has an affair with Tamar; after she tricks him into admitting his guilt, he is forgiven (Gen 38). / Judah’s royal descendant, David, has an adulterous affair with Bathsheba; after confessing his guilt, he is forgiven (2 Sam 11-12).