I have been interested in Citizen Assemblies as more of an evolution of democracy and of the nation state. I see the United Nations as a dysfunctional organization that will be unable to respond serious events such as global warming etc that at some point will be threatening mankind as a whole.
My vision of a global citizen Assembly is similar to the ideas of Albert Einstein, Bertrand Russell, and John Maynard Keynes.
We need a global organization that is liberal democratic in nature and represents the vast majority of people on this planet. Global warming, Nuclear Arms are not issues that will be solved by national governments, because national governments come in various flavours. Some are partially democratic, but primarily oligarchs, some are authoritarian dictatorships, and some are mafia states. In this environment a consensus with regards to the well being, safety and security of the planet will be an impossibility.
The main problems are political and economic in nature.
The vision I see is a global citizen Assembly elected at three levels of government ie local, provincial and nation levels. The global citizen Assembly would compete against traditional political parties at all levels of government, and from various nations, to represent the citizenry, that values freedom of speech, freedom of thought, and the rule of law.
The global citizen Assembly would represent these citizens on a global scale. They would form government.
And eventually create a global citizen Assembly that would be in the same stature as the United Nations except the membership would only be available to liberal democratic nations that are based on the rule of law.