During the Middle Ages, the Catholic Church was the dominant force in Western civilization. As the Dark Ages came to a close, the monarchies of Europe began to consolidate power; providing an alternative power base. With the Protestant Reformation came another blow to the influence of the Church. Spain, the forerunner in the Age of Discovery, was a fervently Catholic country. During the 16th century, the monarchy combined the forces of "cross and crown" in its imperial policy; much to the dismay and ultimate destruction of the indigenous peoples of the New World. Through an examination of Aztec polytheism and the Catholicism of the conquistadors, comes the central role of religion in the successful conquest of New Spain.

When the Spaniards arrived on the Yucatan Peninsula of Mexico in 1519, they encountered the advanced society of the Aztecs. With Tenochititlan at its capital, the Aztec empire was vast. The...