God chooses a family who will be his own. It's clear they're far from perfect but they're still the recipients of a promise that will shape the rest of the Bible. Just further proof that grace—not one’s own merits—is what drives God’s plan.

Bibliography:

Cassuto, U. "The Documentary Hypothesis and the Composition of the Pentateuch: Eight Lectures."

Translated by Israel Abrahams. Jerusalem: The Hebrew University, pp xii-117