That is why peace stories get ruined and are not preferred at all.
1-There is no answer to it
2-Only temporary measures can sustain for some time
3-Ur playing with reality
4-There is no way around this,peace is a real thing and if u make ur story about it then u have no choice but to end that it's not happening.All u can do is show some sentimental things which may or may not work for a peace for given period of short while.Even in that all won't accept those sentimental things which also has it's own limits.
Only thing u can show is a fake unrealistic peace in some sort of fantasy world which again can be only be intended for the children age group of audience .
Exactly. My story does have something like that but I stick to the realistic view. It's something that I always see in life.
Anyway, here, they didn't really cover it at all. They just let it be and bam, it's peace. Forever peace no less. No point of ninja. I just don't get it.