Can anyone think of a blockchain solution for different nations to trust one another? When different countries arrange treaties or trade agreements today there is not much they can do if the agreement was broken. For example, a non-aggressive pact is not worth the paper it is written on, as proven many times in history when a country invades anyway. I was thinking along the lines of a significant proportion of a both nation's economy gets put into a smart contract tied to the treaty holding. That's probably not practical which is why I would like to hear of anyone's better ideas on this issue.