Great post. I just got to the One World exercise in the book last night.
The issue I run into when I visualize Utopia is how to handle the people who are creating problems in it. What would eighteen year old Steve listen to. Is jail the only option?
It's like a clean room versus a dirty room. There are only a few ways to arrange things inside a room to make it look clean, but there are infinite scenarios and permutations where a room looks messy. And it only takes one person a few minutes to completely trash a room.