restricted.
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There is a legitimate need to make biomedical research as safe as possible, but our balancing of risks is
completely skewed. Millions of people desperately need the advances promised by gene therapy and other
breakthrough biotechnology advances, but they appear to carry little political weight against a handful of well-
publicized casualties from the inevitable risks of progress.
This risk-balancing equation will become even more stark when we consider the emerging dangers of
bioengineered pathogens. What is needed is a change in public attitude in tolerance for necessary risk. Hastening
defensive technologies is absolutely vital to our security. We need to streamline regulatory procedures to achieve this.
At the same time we must greatly increase our investment explicitly in defensive technologies. In the biotechnology
field this means the rapid development of antiviral medications. We will not have time to formulate specific
countermeasures for each new challenge that comes along. We are close to developing
more generalized antiviral
technologies, such as RNA interference, and these need to be accelerated.
We're addressing biotechnology here because that is the immediate threshold and challenge that we now face. As
the threshold for self-organizing nanotechnology approaches, we will then need to invest specifically in the
development of defensive technologies in that area, including the creation of a technological immune system. Consider
how our biological immune system works. When the body detects a pathogen the T cells and other immune-system
cells self-replicate rapidly to combat the invader. A nanotechnology immune system would work similarly both in the
human body and in the environment and would include nanobot sentinels that could detect rogue self-replicating
nanobots. When a threat was detected, defensive nanobots capable of destroying the intruders would
rapidly be created
(eventually with self-replication) to provide an effective defensive force.
Bill Joy and other observers have pointed out that such an immune system would itself be a danger because of the
potential of "autoimmune" reactions (that is, the immune-system nanobots attacking the world they are supposed to
defend).
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However this possibility is not a compelling reason to avoid the creation of an immune system. No one
would argue that humans would be better off without an immune system because of the potential of developing
autoimmune diseases. Although the immune system can itself present a danger, humans would not last more than a
few weeks (barring extraordinary efforts at isolation) without one. And even so, the development of a technological
immune system for nanotechnology will happen even without explicit efforts to create one. This has effectively
happened with regard to software viruses, creating an immune system not through a formal grand-design project but
rather through incremental responses to each new challenge and by developing heuristic algorithms for early detection.
We can expect the same thing will happen as challenges from nanotechnology-based dangers emerge. The point for
public policy will be to invest specifically in these defensive technologies.
It is premature today to develop specific
defensive nanotechnologies, since we can now have only a general idea
of what we are trying to defend against. However, fruitful dialogue and discussion on anticipating this issue are
already taking place, and significantly expanded investment in these efforts is to be encouraged. As I mentioned
above, the Foresight Institute, as one example, has devised a set of ethical standards and strategies for assuring the
development of safe nanotechnology, based on guidelines for biotechnology.
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When gene-splicing began in 1975 two
biologists, Maxine Singer and Paul Berg, suggested a moratorium on the technology until safety concerns could be
addressed. It seemed apparent that there was substantial risk if genes for poisons
were introduced into pathogens, such
as the common cold, that spread easily. After a ten-month moratorium guidelines were agreed to at the Asilomar
conference, which included provisions for physical and biological containment, bans on particular types of
experiments, and other stipulations. These biotechnology guidelines have been strictly followed, and there have not
been reported accidents in the thirty-year history of the field.
More recently, the organization representing the world's organ transplantation surgeons has adopted a moratorium
on the transplantation of vascularized animal organs into humans. This was done out of fear of the spread of long-
dormant HIV-type xenoviruses from animals such as pigs or baboons into the human population. Unfortunately, such a
moratorium can also slow down the availability of lifesaving xenografts (genetically modified animal organs that are
accepted by the human immune system) to the millions of people
who die each year from heart, kidney, and liver
disease. Geoethicist Martine Rothblatt has proposed replacing this moratorium with a new set of ethical guidelines and
regulations.
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In the case of nanotechnology, the ethics debate has started a couple of decades prior to the availability of the
particularly dangerous applications. The most important provisions of the Foresight Institute guidelines include:
•
"Artificial replicators must not be capable of replication in a natural, uncontrolled environment."
•
"Evolution within the context of a self-replicating manufacturing system is discouraged."
•
"MNT device designs should specifically limit proliferation and provide traceability of any replicating systems."
•
"Distribution of molecular manufacturing
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