Today’s quote comes from physicist Fritjof Capra. I am just reading through his (so far) superb book, “The Hidden Connections“, which aims to describe “the unified systems that integrate the biological, cognitive and social dimensions of life”.
At any rate, the quote comes from page 9, where Capra is talking about the nature of life, in particular the process of “autopoiesis” (self-making or auto self-creation) where “living networks continually create, or recreate, themselves by transforming of replacing their components”. Here, he demonstrates that “viruses are not alive, because they lack their own metabolism”, but he then goes on to add:
Similarly, a robot that assembles other robots out of parts that are built by some other machines cannot be considered living. In recent years, it has often been suggested that computers and other automata may constitute future life forms. However, unless they were able to synthesize their components from “food molecules” in their environment, they could not be considered to be alive according to our definition of life.
I found this particularly interesting because he approaches the idea of a “living” robot from a biological point of view rather than simply using consciousness or self-awareness as the criterion for a future life form.
Capra has his own webpage, and there is a really fascinating interview with him at intuition.org. Some of his other books include: The Tao of Physics, The Web of Life, The Turning Point, and Uncommon Wisdom.