The whole existence of Feudal Lords seems to disrupt the whole manga. First, where did they come from? We have learned that in the beginning Narutoverse was composed of several small clans fighting with each other, similar to acient China. Hashirama and Madara developed the village system which combined the small clans within a specific region. Hashirama was the leader of this village, so why would he pledge loyalty to some one who did nothing to help the clans or establish peace.
Second, it seems that the major villages are ran by the Kages like a business. The Kage being the General Manager and the Feudal Lords being the owner of the business. The Kages have to report to the Feudal Lords and make money for the Feudal Lords by doing missions and fighting. Most of the conflicts in Naruto are based on different interests between Nations, i.e., feudal lords, or other business men that have opposing financial interests to the person that hires a village for protection. These conflicts are what give rise to the animosity and grudges between different villages. So it seems that this cycle of hate constantly referred to in Naruto manga, begins with the desire/need to please the Feudal Lords by making money, going on missions, and fighting during those missions.
So even if Naruto can convince all the ninja to forgive and forget and stop fighting out of hatred, there won't be peace in Narutoverse as long as the Villages have to appease the Feudal Lords. They will still have to make money and in turn they will still have to go on missions and fight. The only way to achieve peace is to abandon the way of the Ninja. They will have to all agree to no longer fight each other, which will mean that there is no more need for missions, and no way for them to make money and make a living as a ninja. But I just can't see this happening in the end of Naruto, if for no other reason than without Ninjas and the village system there will be no Hokage, and that has been Naruto's ultimate goal from the beginning.
So why did Kishi even create the Feudal Lords? He doesn't seem to create characters for no reason, they all play some part in the development of the plot. They don't seem to serve any purpose other than to propogate the system that Naruto is trying to fix.
Second, it seems that the major villages are ran by the Kages like a business. The Kage being the General Manager and the Feudal Lords being the owner of the business. The Kages have to report to the Feudal Lords and make money for the Feudal Lords by doing missions and fighting. Most of the conflicts in Naruto are based on different interests between Nations, i.e., feudal lords, or other business men that have opposing financial interests to the person that hires a village for protection. These conflicts are what give rise to the animosity and grudges between different villages. So it seems that this cycle of hate constantly referred to in Naruto manga, begins with the desire/need to please the Feudal Lords by making money, going on missions, and fighting during those missions.
So even if Naruto can convince all the ninja to forgive and forget and stop fighting out of hatred, there won't be peace in Narutoverse as long as the Villages have to appease the Feudal Lords. They will still have to make money and in turn they will still have to go on missions and fight. The only way to achieve peace is to abandon the way of the Ninja. They will have to all agree to no longer fight each other, which will mean that there is no more need for missions, and no way for them to make money and make a living as a ninja. But I just can't see this happening in the end of Naruto, if for no other reason than without Ninjas and the village system there will be no Hokage, and that has been Naruto's ultimate goal from the beginning.
So why did Kishi even create the Feudal Lords? He doesn't seem to create characters for no reason, they all play some part in the development of the plot. They don't seem to serve any purpose other than to propogate the system that Naruto is trying to fix.