More on Limits to Growth

There was a gratifyingly large response to last Friday’s post Acolytes of neo-Malthusian Apocalypticism. Several of the commenters seemed to think I was trying to refute the LtG model, but that would require a whole book instead of one blog post. I consider LtG to have been demolished in detail by people with a lot… Continue reading More on Limits to Growth

Acolytes of neo-Malthusian Apocalypticism

When I was in college 35 years ago, there was a major fad of neo-Malthusian doom-mongering, led by the “Limits to Growth” book and movement. A retreat was organized from the college, and some concerned, environmentally conscious professors and students, myself included, went off for a concentrated seminar in which we educated each other about… Continue reading Acolytes of neo-Malthusian Apocalypticism

Replicating nanofactories redux

Over at Accelerating Future, Michael Anissimov continues the discussion about nanofactories. He says a number of reasonable things, but then mischaracterizes, or at least greatly oversimplifies, Foresight’s position on nanofactories and self-replicating machines in general: The general implied position of the Foresight Institute appears to be, “we’ll figure these things out as we go, MNT… Continue reading Replicating nanofactories redux

Bat Wings

Evolution has adapted what were the bones of the fingers of the bat’s ancestors to form the skeleton of its wing. Similarly, in technology, when one element of a system is capable of expanding to take up new functions, it can substitute for what might have been expected to be different ways to achieve the… Continue reading Bat Wings

Mindsteading

Reading this essay by Peter Thiel, I was struck by an amusing (though almost certainly coincidental) parallel. Thiel mentions three areas in which people interested in freedom may manage to get out from under the thumb of excessive government: cyberspace, seasteading, and outer space. The parallel is to three fronts on which people are pursuing… Continue reading Mindsteading

Does seasteading need nanotech?

I recently heard a talk by Patri Friedman about seasteading. Seasteading means “homesteading the sea,” or at least building floating cities and establishing permanent residences there, and ultimately alternative polities in hopes of enabling beneficial economic competition in the field of governance. Before saying more, let me point out that I am generally in agreement… Continue reading Does seasteading need nanotech?

More energy

The power density is large compared to that of macroscale motors: >1e15 W/m^3. For comparison, Earth intercepts ~1e17 watts of solar radiation. (Cooling constraints presumably preclude the steady-state operation of a cubic meter of these devices at this power density.) Nanosystems p. 339 It is difficult, even for someone who has been working with these… Continue reading More energy

Early retirement — how soon?

In my Early Retirement post, I wrote If you have a human-level AI based on computer technology, the cost to do what it can do will begin to decline at Moore’s Law rates. Even if an AI costs a million dollars in, say, 2020, it’ll be a thousand in 2030 and one dollar in 2040… Continue reading Early retirement — how soon?

The world is flat

In this post I began considering the prognostications in George Friedman’s The Next 100 Years, in light of some of the kinds of changes in technology that might come online during the century. This is obviously hard to do, but imagine trying to predict the geopolitical course of the 20th century without understanding the possibility… Continue reading The world is flat

Required Reading

What forces are going to shape the world throughout the 21st century? A recent NYT bestseller, The Next 100 Years, by George Friedman, proposes a number of very interesting theories. Friedman is considered to be something of an intellectual maverick, contradicting the conventional wisdom at many points, and very insightful, since in many cases his… Continue reading Required Reading

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