Imagine a feudal society. The peasant, the warrior, and the priest all exist together. The peasantry was larger than the army, and the army was larger than the priesthood.
The peasant was born poor and destined for servitude. He lacked knowledge and resources. He was the tool of the powerful, a toy. He provided the physical labour, producing goods and services for others enjoyment. He was told what to do and how to do it. And, over time, he learned never to question his masters. But, by the laws of power, there were more peasants than warriors or priests combined. He could do nothing and was not a threat. His purpose was to suffer, and it guaranteed the survival of society.
The warriors purpose, however, was to compete, fight, and win. He trained every day. He ate, slept, and killed. Over time, with skill and experience, he ascended the warrior ranks. He was rewarded for his aggression, dominance, and victories. The warrior had many tools available to him. His sword was sharp for killing. His shield was strong for protection. Everyone who fought the strongest warrior died. His strength guaranteed the survival of society.
The priest, powerful and wise, did not compete directly with the warrior, for he would surely be killed. He had no sword or shield, only his scroll of teachings. Yet, the few priests were given the most reverence and defined life for the peasants and the warriors. His purpose was to simply define the common wisdom. Often the warrior would challenge the priest for power, but the priest refused to engage with a sword. And thus, the warrior could never truly prove himself above the priest. If he killed the priest, the peasants thought him evil and sought to punish him. Truly, the survival of society guaranteed the power of the priest.
Today, strong warriors use knowledge, fact, and logic to attack but are still unable to overcome a wise priest.