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- Date: Thu, 28 Jan 1993 09:20:11 -0700
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- From: "William T. Powers" <POWERS_W%FLC@VAXF.COLORADO.EDU>
- Subject: It's Evolution's Will
- Lines: 60
-
- [From Bill Powers (930128.0845)]
-
- Greg Williams (930128) --
-
- Durward Allen's musings are reminiscent of the preacher trying to
- explain to his congregation why God let the crops fail, let the
- children get polio, let the dam break, and allowed inflation to
- devalue the old folks' pensions. It's all part of the grand
- design, sez he, although we mere mortals can't understand the
- justice of it.
-
- A lot of things in the world just happen. They don't have any
- particular reason for happening; they're side-effects. If the
- beaver spends a lot of energy half-ringing trees, well, the
- beaver manages to finish the job enough of the time to get along,
- and the waste of energy isn't any particular problem to beavers.
- They are, after all, control systems. If they use a bit more
- energy, they can just eat a little more. The dam they had in mind
- to build gets finished anyway (I'll bet you don't find a lot of
- half-ringed trees surrounding half-finished dams).
-
- When evolution is used as a catch-all explanation for everything
- that happens, it gets pretty close to vitalism. What's the
- functional purpose of baking bread of a kind that dries out so
- that crumbs fall from your peanut-butter sandwich onto the floor?
- Why, it's to feed the ants, which scavenge dead materials and
- prevent the spread of disease! So bakers have evolved to produce
- bread in the way they do in order to protect their own species
- against germs, and ants have evolved to scavenge little bits and
- pieces of stuff because that helps to evolve big sloppy creatures
- that scatter food around for the ants to eat. The prototypical
- example of this kind of evolved symbiosis is The Picnic.
-
- At the core of any organism's existence is a set of controlled
- variables that the organism maintains in states that are of
- evolutionary benefit to the organism. In the process of
- controlling these variables, the organism acts on its
- environment. Those actions control those variables, maintaining
- them at their reference levels and counteracting disturbances.
- But they also produce myriad side-effects. Those side-effects are
- part of the world in which other organisms live; some are
- deleterious and some are helpful to other organisms' control
- processes. If they're deleterious, the other organisms counteract
- their effects as best they can; if helpful, the other organisms
- relax their efforts. The result is to keep side-effects of one
- organism's action from materially affecting the variables
- controlled by others.
-
- Somewhere among all these interactions there are no doubt special
- adaptations in which one organism feeds off the side-effects of
- the control processes of other organisms and vice versa. But
- human beings are very good at making up stories; they can make
- EVERY interaction seem to have an evolutionary purpose. All the
- story-teller really needs is plausibility. If the listeners are
- in the mood, they can suspend disbelief and enjoy the tale.
- There's no danger of anyone proving that the story is false.
- --------------------------------------------------------------
- Best,
-
- Bill P.
-