First of all, we mass migrated a long long time ago before the Neolithic revolution, second of all we didnt have a mass extinction event because we were suddenly able to put seeds in the ground and make them food, and third of all I dont know of any mass megafauna extinction early on in the Neolithic period
As the anointed representative of the Lord, the Judean king was seen by Old Testament writers as a mediator of the covenant between the Lord and his people.