O'Neill's dream of vacuuming people off of Earth (was Overpopulation)

--- In spacesettlers, Don Davis wrote:
> overpopulation cannot be realistically addressed by
> space colonization.

O'Neill said it could be.
http://www.nas.nasa.gov/About/Education/SpaceSettlement/CoEvolutionBoo
k/Interview.HTML
http://tinyurl.com/5vc66s

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O'Neill: [...] The long-term plan, really dream,
that I would have is a situation in which, in
50, 100, 150 years, it would be so cheap to
replicate large communities that you would be
building quite large ones, many, many square
miles in land area for each one, and they would
be very thinly populated.
[...]
O'Neill: [...] this possibility if pursued, is
one that could occur both on the Earth and in
the communities of course. Because the
existence of the space communities as a place
to which many people might choose to move would
also be perhaps the only realistic non-violent
way in which the Earth's population might
really decrease.
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