Pain's also Damn I wanted I wanted to make this thread but was too lazy lmao.
I believe Nagato's intention of building a super weapon to threaten the countries was a perfect way to get everyone to play nice. After I think most people wouldn't want to get blown up. Peace would be made, eventually relations would improve, more and more people & ninja would work together to guard this super weapon to keep it out of Evil's reach. It could work imo.
Obviously I like Naruto's but realistically Nagato Pains is more realizable.