____ I think a point of clarification is needed concerning the use of the term "playing God" to describe the **ethics** of SB. In my view ethics is the branch of philosophy that deals with the rights and wrongs of how humans treat one another. If creating a new "biomimetic" life form (one whose operating system runs on DNA, RNA and proteins, but whose developmental programs are unique) is to be judged on ethical grounds, the implication is that ethics includes a theological issue, namely the assertion that creation is God's prerogative and thus infringing on it is an "unethical" sacrilege. (Of course, if the novel organism is harmful to humans or likely to replace humans, ethics comes back into the picture.)
____ This is not a new issue, of course. The myth of Prometheus encapsulates the same notion of a hierarchy of rights with only the gods allowed to do certain things. Prometheus does not play by those rules, and depending on the ancient source, not only gets credit for bringing fire to humankind (probably the most important technological advance in all of human history), but also **makes humans** from clay (he was an early synthetic biologist!). The poem "Prometheus" written by J.W. Goethe in 1773 (at the height of the Enlightenment) expresses Prometheus' defiant, self-sufficient attitude and his scorn for Zeus, the chief deity. He extols reason over subservient fate, quite literally "playing God." The poem can be accessed in German and English translation at
http://www.freeinquiry.com/prometheus.html.
____ Again, if we adopt a deistic framework to discuss the issue of the "ethics of synthetic life," it's easily possible to reach a counter-intuitive conclusion about what is natural (and thus, by the standards of those who object to scientists "playing God," a definition of what ought to be allowed). In this scheme, God -- the master clockmaker -- specifies the laws of mathematics, physics and chemistry that determine what can occur in this universe. She then provides a supply of matter and energy and lets the whole drama begin -- with a bang! It churns along for 12-15 billion years or so, and along the way life emerges from natural processes, develops via natural selection, and ultimately produces a clever creature, Homo sapiens. That particular expression of the universe's fecundity happens to have remarkable technical capacities thanks to a big brain, opposable thumbs, etc. But these humans are simply **natural creatures.** Therefore, whatever they (i.e., we) do is also an expression of the **natural capacity** of the evolving universe. And just as birds build nests, humans build houses. Beavers build dams and flood the landscape; so do humans. Temites build air-conditioned mounds; ants cultivate fungal gardens, etc. Are we to discriminate in such a way that whatever humans do beyond the confines of our bodies is considered unnatural, but bird nests, beaver dams, termite mounds, ant gardens (and other such objects) are "natural"?
____ Thus, following along the lines of this simple deistic scenario -- which probably approximates the Weltanschauung (world view) of many scientists, including the atheists who adopt the it except that they don't attribute the origin of the universe to a deity -- we can conclude that, in the final analysis,**human activity of all kinds,** including science and technology, **is natural.** Does that completely demolish the admonition of "don't play God?" Naturally, other scenarios would lead to different conclusions (since they would depend to a greater degree on faith and less on reason than simple deism). The admonition, however, has **one remaining merit**, even for died-in-the-wool deists and atheists. As we ought to appreciate, the biosphere that we depend on consists of many, complicated interactions. We may think that we can accurately predict the consequences of our actions with respect to living organisms -- but history tells a different story. Hence a sensible degree of respect for the precautionary principle should remain. It behooves us to ask, what if our assumptions (about a synthetic organism, for example) are wrong? Can we pull the plug? Can we stop our project before it spirals out of control? That **is** an ethical question.