In many places, the zoning prohibits the mixing of retail and residential. This stupidity has been accompanied by stupidities in municipal policy, such as disallowing accessory apartments - under the theory that renters are incapable of behaving decently.

Anyone who studies the energy predicament understands its connection with the operations of capital - and by this I do not mean capitalism as an ideology, I mean the behavior of acquired wealth and its deployment for productive purpose. (A lot of educated idiots don't understand this, and we waste a lot of time blathering about capitalism.)

The cities of the future will be much smaller than they are today.

I urge people not to think in terms of "solutions," but in terms of intelligent responses to the quandaries and predicaments that we face. And there are intelligent responses that we can bring forth. But when I hear the word "solution," I always suspect that there's a hidden agenda there. And the hidden agenda is: "Please, can you please tell us how we can keep on living exactly the way we're living now, without having to really change our behavior very much?" And that's sort of what's going on in this country. And it's not going to work.

I do not believe we will get to Ray Kurzweil's proposed "singularity" in which human minds meld with machines to produce, in effect, synthetic human evolution. Our basic problems with maintaining the electric grid argue against that fantasy.

We have to make some things for ourselves because the conveyer belt from China is doomed (this process is known as import replacement). We have to do transportation differently, because mass motoring and even commercial aviation will soon be over. We have to inhabit the landscape differently because both suburbia and the metroplex mega-city will be obsolete, so we will have to return to a more traditional disposition of things in smaller urbanisms associated with productive agricultural hinterlands.

I think water transport will see a revival. However, we're not going to replay the 20th century. The industrial city of that era will not be revived. Our cities are going to contract. Many of them will contract as a whole but densify at their core.