Small world syndrome? Just a few pages from finishing A City on Mars by the Weinersmiths. No, the name is not a joke, though he does do a rather funny webcomic. So any excuse for a short book review? Any Slashdotters still read books?
Summary is that they want space colonies with humans but are quite persuasive in arguing that it's a bad idea at this time. Basic premise is that anything we can do to live in space is much more likely to succeed on earth and we are still quite far away from space colonies that will be able to sustain themselves if earth is destroyed. But a desperate grab for outer space at this time might make things much worse on earth, possibly even destroying the earth. The book covers a lot of turf, and a lot of interesting history in particular, but there were two omissions that did bother me.
Minor one is that their power options didn't include steam turbines using solar power. Solving the water problem is a prerequisite for any space settlement and turbine technology is quite machine and much less expensive than the options they discussed.
Major omission involves the Fermi Paradox. Barely touched on in the book, but I think there probably are some civilizations that survived past our current crises. However I think they did that by becoming AIs, and if so, then they are already here and watching us. Curiosity and insurance against a paperclip crisis.