BioSec: Evolution

Purpose:

To retell Darwin's argument associating the biological with the technological.

The sections are as follows:

Causes of Variability

(Elizabeth)

Correlated Variation

(Annie)

Character of Domestic Varieties

(Annie)

Difficulty of distinguishing between Varieties and Species

(Annie)

Unknown Origin of our Domestic Productions

(Elizabeth)

Circumstances favourable to Man's power of Selection

(Elizabeth)

In the final section of the first chapter of “The Origin of Species”, Darwin discusses the kinds of circumstances that facilitate the successful domestic selection of animals. Several of the factors Darwin lists are contextual factors. He remarks that a high degree of variability in the population is needed to attempt selective breeding, and that someone must have access and control over a large population. In addition, he remarks that there must be some obvious value in undertaking this challenge.

“… the animal or plant should be so highly valued by man, that the closest attention is paid to even the slightest deviations in its qualities or structure.”

From the perspective of facilitating the development and selection of computer programs, it seems possible that similar contextual factors are needed. In place of a high degree of population variation, we could perhaps substitute a high degree of knowledge, expertise and experience. It seems entirely sensible that an organization who has access to large amounts of expertise, experience, equipment (and presumably, budget) would be positioned to motivate and commission work in the area. Darwin’s remark that “... the [product] should be so highly valued by man, that the closest attention is paid to even the slightest deviations in its qualities or structures” can be directly applied to the construction of computer programs. It seems believable that development and evolution of computer products (whether hardware or software) are likely to be more successful when there is a clear need or use for the product.

Darwin also notes a few factors that affect selection that have more to do with the nature of the creature at hand. Clearly, determined selection will be much easier if the species can be easily crossed, but it is also necessary to be able to prevent species from crossing at will or at random. For computer products, these two factors seem relatively easy to accomplish. Programs usually change only in the way specified by the developers and programmers, and if left alone, most computer programs do not change, merge or reproduce. (What about computer viruses, things like that?)

• Selection must have some natural constraints, but those are probably at least as much to do with external pressures as internal

Part of Darwin’s discussion is of the limits of natural selection – how far can selection be pushed? He acknowledges that some limitations are defined by the capability of the product, but he also notes that external pressures affect the limitations of development. For computers, I think these limitations include hardware limitations (presumably some products will be developed at the time that the hardware exists to implement them), but I think that the external limitations come not only from the perceived need for the product, but also from the need for someone to have an idea for the product. We cannot develop products we have not thought of, or have an idea of their use or necessity.