Monday, August 23, 2010

INTERNET - The Information-Age Replicator

"The Third Replicator" by SUSAN BLACKMORE, New York Times 8/22/2010


All around us information seems to be multiplying at an ever increasing pace. New books are published, new designs for toasters and i-gadgets appear, new music is composed or synthesized and, perhaps above all, new content is uploaded into cyberspace. This is rather strange. We know that matter and energy cannot increase but apparently information can.

It is perhaps rather obvious to attribute this to the evolutionary algorithm or Darwinian process, as I will do, but I wish to emphasize one part of this process — copying. The reason information can increase like this is that, if the necessary raw materials are available, copying creates more information. Of course it is not new information, but if the copies vary (which they will if only by virtue of copying errors), and if not all variants survive to be copied again (which is inevitable given limited resources), then we have the complete three-step process of natural selection (Dennett, 1995). From here novel designs and truly new information emerge. None of this can happen without copying.

I want to make three arguments here.

The first is that humans are unique because they are so good at imitation. When our ancestors began to imitate they let loose a new evolutionary process based not on genes but on a second replicator, memes. Genes and memes then coevolved, transforming us into better and better meme machines.

The second is that one kind of copying can piggy-back on another: that is, one replicator (the information that is copied) can build on the products (vehicles or interactors) of another. This multilayered evolution has produced the amazing complexity of design we see all around us.

The third is that now, in the early 21st century, we are seeing the emergence of a third replicator. I call these temes (short for technological memes, though I have considered other names). They are digital information stored, copied, varied and selected by machines. We humans like to think we are the designers, creators and controllers of this newly emerging world but really we are stepping stones from one replicator to the next.

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