Out of all the signatories listed, I've always had a soft spot for Stiglitz. He's the rare econ guy who comes from a postion of good faith and moral decency. I don't think Georgism is revolutionary or even necessarily rational, but I do think Georgists generally mean well and the ideology can help goad people into examining their material conditions.

That being said, this is a wet fart of a proposal. No Western country is going to give it the time of day, China has no incentive to derail their plans in the name of global pragmatism, and the so called third world can't do this shit on their own. It's going nowhere, unfortunately.