Mankind
is undoubtedly the pinnacle of evolution's achievement so far, in terms of
intelligence and the ability to purposefully change the natural world which is
brought us into being. Of course, since these are the traits we are dominant
in, we tend to regard them as the most fitting criteria to determine
evolutionary ascendancy. We are certainly not evolution's pinnacle in terms of
numbers-many different species ranging from beetles to bacteria must populate
the world in far greater numbers than ourselves. In terms of biochemical
abilities we are pathetic, helpless, creature compared with plants, whose
photosynthesis 'cleverness' we depend on ,and a multitude of organisms from
bacteria to various other vertebrates which can manufacture many more of the molecules
they need to survive and grow than our vitamin-dependent selves. Our ability to
rearrange or destroy the natural world,
to make vast prairies of wheat, new breeds of horses and dogs cattle and crops,
to demolish rain forests and eradicate dangerous pathogens such as the virus
that used to cause smallpox, has been purchased in return for a hopeless
dependency on the very creatures we can manipulate or destroy.
For many years mankind has been able to act as the 'sharper
of life' in various indirect ways, such as selective breeding or extermination,
shepherding, chemical control and cultivation. Throughout the 1970s we became
steadily able to shape new life directly, thanks to the emergence of the ne
'biotechnology' known as genetic engineering. Genetic engineering is a blanket
term for a host of different biochemical techniques which promise to ultimately
give us complete mastery over the nature of life on the planet, and on any
other planets we choose to colonies as well. All of the living things on the
earth today are at heart composed of genes that encode proteins. Genetic
engineering allows us to tinker directly with the chemical that genes are made
of DNA. It allows us to take genes out from living things and study them. It
allows us to put new genes into living things that would never have acquired
such genes by more natural means. It allows us to chop us genes and to change
them, to swap genes around between living things, to manufactures entirely
novel genes not yet discovered by evolution, and to generally explore the full
potential of DNA as a carrier of genetic information at an unbelievably faster
rate than the slow remorseless march of conventional evolution.
Mankind, by learning the skills of genetic engineering has
become a radical new, dramatically fast and powerful mechanism of genetic
change. Unlike the conventional mechanisms of genetic change, mankind can
purposely direct evolution towards specific goal.
Therefore, it is easy to laughingly dismiss the idea that
the relatively trivial tinkering of today's genetic engineering could
eventually lead on to the creation of such 'wonders' as photosynthetic
disease-free humanoids, with regenerating brains and a life span to many thousands
of years; but genetic engineering, with its potential to take over the 'reins'
of evolution from Darwinian natural selection, can make the laughingly likely.
If the slow march of evolution by natural selection has allowed single cells to
give rise to humans, what might humans be changed into by much faster process
of purposeful genetic engineering? Isn't it?
0 comments:
Post a Comment