I missed this earlier in the week, but Mike Snead has a long essay on passenger safety over at The Space Review. It’s a useful history, that touches on many of the themes of my book, but I believe that it’s technologically premature to apply the principles to human spaceflight. Spaceflight participants (not passengers) must be aware of the risks of the varied methods of building spaceships, and accept them accordingly. No one should, at this point in history, get aboard one with the same expection of getting safely off that one does with an airliner, particularly because different people have different risk tolerances and goals. There will come a time when trips to space will be considered common carrier, on certified vehicles, but we are years from that time.