Oracles exist so that priests can control whole populations. The Greek oracle was the tool of the priesthood, who conveniently served as interpreters of her words to kings.
The priests of the Christian Church once kept Bibles chained to pulpits. This made them the only ones with access and thus the ability to interpret scriptures.
There is obviously something very powerful in pursuing divine or sacred knowledge as an individual. It is this power that elites have always feared.
Paradigms are the product of life. As life changes, so too do paradigms. If growth is natural, then it is only natural that paradigms crumble and fall over time.
In truth, it is the attempt to save a paradigm once it is outmoded that is the most unnatural act of all.
There is a single cultural heritage and mythic tradition running through every history of all peoples around the world. It must be at least 25,000 years old, and it went through precisely the same stages of development throughout the entire earth.
This was reflected over time by parallel forms of shamanic beliefs and monumental construction of sacred sites. Where once there were temples of earth and stone, later there were cathedrals and sacred grounds for churches.
The general cosmological model of all religions going back to the dawn of the human age is fundamentally the same. The model itself never changed, although each new form of worship did change the meanings of things within the model.