Fernly, great enumeration of some of the challenges! I'm completely with you on the difficulty, and agree that this won't happen soon. Even so, 200 years ago

Fernly, great enumeration of some of the challenges! I'm completely with you on the difficulty, and agree that this won't happen soon. Even so, 200 years ago the steam engine was just being developed; since then we've had the rest of the scientific, industrial, and information revolutions. So the question is what will happen 200 or 2000 years from now? A sunshade seems plausible on that time-frame, and the paper is one way to begin the conversation about such a project.