Was feudalism a beneficial way of organizing society to keep order during the Middle Ages or was it an oppressive government system that largely benefited the wealthy kings and nobles?

Feudalism was an oppressive government system; once you were born into a class, you stayed there. There was very little social mobility, so it’s quite apparent to see why only the royals and nobles would benefit from such.

The significance of the result is the change

Iraq because its lack of policing and government concern