The picture of Teotihuacán that emerges is a classic picture of positive feedback among obsidian mining and working, trade, population growth, irrigation, and religious tourism.

Then comes a sect of a religious group who warns you against the Devil who is fooling people through false teachers. Accept the authority of his scriptures you are told. His way is the only way.

Classic secularization is a historical process, the general background of which was the evolution, decline and loss of primitive religions and the trend of separation of government from church.