On the whole the evidence points to this conclusion. The idea of a one Supreme God who was a Spirit, while all other gods were mere idols made by men's hands; who created and ruled all things in heaven and earth; and who loved justice and mercy rather than the blood of rams and bullocks, was slowly evolved from the crude conceptions of a jealous, vindictive, and cruel anthropomorphic local god, by the prophets and best minds of Israel after it had settled down under the Monarchy into a civilized and cultured state. It appears for the first time distinctly in Isaiah and Amos, and was never popular with the majority of the kings and upper classes, or with the mass of the nation until the Exile, but it gradually gained ground during the calamities of the later days, when Assyrian armies were threatening destruction. A strong opposition arose in the later reigns between the aristocracy, who looked on the situation from a political point of view and trusted to armies and alliances, and what may be called the pietist or evangelical party of the prophets, who took a purely religious view of matters, and considered the misfortunes of the country as a consequence of its sins, to be averted only by repentance and Divine interposition. It was a natural, and under the circumstances of the age and country quite a justifiable proceeding on the part of the prophetic school to endeavour to stamp their views with Divine authority, and recommend them for acceptance as coming from Moses, the traditional deliverer of Israel from Egypt. For this purpose no doubt numerous materials existed in the form of legends, traditions, customs, and old records, and very probably some of those had been collected and reduced to writing, like the Sagas of the old Norsemen, though without any idea of collecting them into a sacred volume.