Pre-modern history classes – how come there’s warrior, clergy, elite?

Question

I like history and I recently noticed that across different pre-modern cultures there’s almost always seem to be at the most basic level always the 3 classes: an elite class, a warrior class and a clergy class. Why is that? Why not food-producers or something?

In: 0

Answer 1

Both the clergy and warrior class had something the other classes did not.
Opportunity to gain wealth and power.

Not every warrior or clergyman did actually make it big. But some could, and those could use that power to gain wealth, and wealth to gain power.

And those positions got transfered to their children (friends/allies)
So once you were in, you had good chances of staying in