Lobbying and hand-waving about "space colonies" is easy. Real space industry and colonization is hard. It will happen via many small steps, not from central planning or all-encompassing geoengineering. https://unenumerated.blogspot.com/2006/10/how-to-succeed-or-fail-on-frontier.html … https://unenumerated.blogspot.com/2009/04/polynesians-vs-adam-smith.html … http://www.fon.hum.uva.nl/rob/Courses/InformationInSpeech/CDROM/Literature/LOTwinterschool2006/szabo.best.vwh.net/comet.mining.html …https://twitter.com/foundersfund/status/996408053925724160 …