Michael Vassar: I agree about nano-goo and papercip scenarios having too many unknowns to be planned for at this time except in very broad terms. Regarding economic collapse, what do you think of the following statements...

1. Technological knowhow is easier to preserve than to re-discover. 2. Even if entire nations go down due to the economic collapse, smaller polities can persist, preserve technological knowhow, and maintain a decent standard of living locally. 3. To create such a community is expensive, but the funds can be raised by following an investment strategy informed by insights into the upcoming collapse.