Who is Uriel from The Source; a Novel and what is their importance?

Uriel is a descendant of the Family of Ur and functions as a leader of Makor, seven hundred years after the incident involving Urbaal. He is forty-one years old, married to Rahab and has one son named Zibeon. Makor was prosperous under his leadership. He allows the settlement of the Hebrews and believes they will assimilate. Zadok tells him that the Canaanites must accept El-Shaddai and war breaks out. Most of the Canaanites are killed in the burning of Makor. Uriel survives but is killed when he refuses to accept El-Shaddai.