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Original post by Alpha_ProgDes
But seriously, is our reliance on machines and technology causing to evolve slower, standstill, or just devolve?
You've just made the case for artificial selection, which is also known by another name historically.
Francis Crick, co-discoverer of the structure of DNA, wrote:
"In the long run, it is unavoidable that society will begin to worry about the character of the next generation....I would be astonished if, in the next 100 or 200 years, society did not come round to the view that they would have to try to improve the next generation in some extent or one way or another." James Watson, the other co-discoverer of DNA's structure, was also sympathetic to some forms of eugenics.
Consider a genetic algorithm, where the two main components, other than the candidate solution or candidate algorithm population, are the fitness evaluation function and the mutation procedure. I'm going to ignore crossing/breeding without loss of generality. Now consider that the fitness has been rising over several generations. To be more realistic, we allow the fitness function to smoothly vary over time but mostly in conjugate manner as to avoid going backwards in some sense. The natural selection which this fitness function simulates will cause the population to tend to rise towards local maxima and the mutation will cause some of them to escape these local maxima and explore others in the fitness landscape, so as to allow more global ones to be found. The thing to note here is that over generations there is a bias towards higher fitness compared to an average level of fitness that might be generated by a completely uniform random sampling of the fitness landscape. Due to an obvious topological consideration, removing the fitness selection process and only leaving mutation you would inevitably randomize the population such that the average fitness would degrade. This would only not be the case if the population was biased towards minima, which of course would not be the case. In other words, unless your fitness criteria were reversed, then abandoning selection and leaving only mutation (randomization) would wreck the fitness of the population over further generations.
In our case, even though we've severely curtailed natural selection by things such as modern medicine allowing genetically-caused illness patients to survive into breeding age, and various social programs, one cannot say that we don't have selection overall, just that it's much less forceful and that it's been partially replaced by some measure of artificial selection. But there's no overall plan or reason behind the factors playing into this artificial selection; in other words, nature is no longer holding our genetic evolution reins but neither are we--we're leaving it to ad hoc and even arbitrary processes.
Perhaps it's time, as various esteemed geneticists have suggested over the decades, to take hold of the reins of our evolution.