Here's the new thread for posting quotes, with the usual rules:
- Please post all quotes separately, so that they can be voted up/down separately. (If they are strongly related, reply to your own comments. If strongly ordered, then go ahead and post them together.)
- Do not quote yourself.
- Do not quote comments/posts on LW/OB.
- No more than 5 quotes per person per monthly thread, please.
Recomputing everything/random things/currently unsatisfying things is expensive and error-prone. The standard for new good ideas may be to look at other cultures. For example, public transport was my first thought (I've lived in large cities in Western Europe). If nobody anywhere has implemented your awesome suggestion, maybe it's a rare problem so few solutions have been tried, maybe everyone got stuck in poor local optima, or maybe it sucks.
I agree that such looking ought to be one's first recourse, for exactly the reasons you cite. I note, however, that one should look at subcultures for ideas as well, not just at the mainstream cultures of different geographical regions. For example, if I were to look at methods of solving the issue of shelter mentioned in the quote, I would not just look at how regular people lived in the cities of Japan or the countryside of North America, but also at how, say, people in the frugality movement or soldiers in the military dealt with it. Maybe some historical cultures, too, if I could easily find enough information about them.