here are two examples of imperfection of the human body:
it is not easy to wash your back very well
look at how many people wear glasses
looks like evolution didn't make a perfect work
and to religious people,why a perfect and omnipotent being did not create a perfect human body?was it difficult for him?
Most Helpful Guy
Evolution is not some guiding force that some people are led to believe. It is simply the change of characteristics over time based on trait elimination/reproduction based on how well they allow the animal to survive.
As for washing your back, utility my friend. If your arms could swivel enough to wash your back, they would lose the ability to transfer as much power from your core as you can now. Washing your back is a conscious human need, but not washing your back won't get you killed in nature.
As for people wearing glasses, you've just happened upon something called society or civilization. By living in concrete jungles as we do, moderately safe from being directly exposed to nature, we allow bad traits to pass on because there aren't situations that would cause those traits to be the end of the individual.
Bad eyes, for example: Assuming we lost all technology and civilization as we know it and had to survive like cave men and women, bad eyes, allergies, physical deformities, etc...would quickly disappear. The reason? They are either dead weight and stop being supported by the stronger members with time, or another strong member of nature picks them off.
That is how evolution functions. You're welcome ;)6