On 2/27/99, Hal Finney wrote:
>With the entire story taking place in the Slow Zone, technology is capped
>at a level not too far above our own. Super-intelligence and even human
>level AI is impossible; software projects inevitably bog down in their
>own complexity before something as complex as human AI can be reached.
>Medical science allows people to live perhaps 300-500 years at most
>(although with cryonic suspension their lives can extend over much
>longer periods). Nanotech remains a dream which was never fulfilled.
>
>Most civilizations are trapped in a cycle of boom and collapse, similar
>to Niven and Pournelle's Moties. The Qeng Ho help to moderate this
>effect somewhat as they carry technology between star systems in their
>ramscoop powered vessels. ... All in all I found it a depressingly
>limited future. ... if you're looking for the kind of grand-scale
>ideas which Vinge provided in Fire, I don't think you'll find them here.
I just finished the book moments ago. It was a fun read, if a bit long.
So does Vinge present a plausible detailed picture? I'm not sure. Limits to software complexity were plausibly presented, and so I could buy the lack of AI or advanced automation. Though the story doesn't say so, I suppose complexity limits could also explain the life extension limits described. The failure to make substantial progress in physics seemed more arbitrary, though I suppose very subtle effects might remain hidden for millennia until the right clues were presented.
Perhaps most puzzling is the failure to use any significant fraction of the resources at each solar system. Human populations around a star are never more than "billions", and we see nothing like wholesale conversion of asteroids and comets. "Sooner or later [each system] ossified and politics carried it into a fall."
Also the numbers don't seem to add up. One big meeting described had ships traveling from 300 star systems, each traveling between 100 and 1000 years, and "perhaps a third ... would have fallen from civilization in the time it took for voyage and return."
This suggests an expected civilization lifetime of 500 to 5000 yrs (exponentially distributed) after achieving starflight. But at current population growth rates even a 500 year lifetime gives a median population growth factor of 1000 between initial starflight and fall population. And at current economic growth rates the economy would grow by a factor of 10 billion.
The frustrating thing about using science fiction to think about these issues is not knowing whether the author thought they had good reasons to expect things described, whether they were just choices to make the story easier to tell, or whether the author just didn't even notice them. I suspect one big problem is that Vinge doesn't really believe in these limits.
Robin Hanson
hanson@econ.berkeley.edu http://hanson.berkeley.edu/ RWJF Health Policy Scholar FAX: 510-643-8614140 Warren Hall, UC Berkeley, CA 94720-7360 510-643-1884 after 8/99: Assist. Prof. Economics, George Mason Univ.