WoodYouLike said:
In the end one of those virii or bacteria will make us extinct,
I agree, we could be destroyed by man (virii) or bacteria... or possibly viruses
(sorry, just being very very pedantic: plural of "virus" is actually "viruses"!
)
I had actually tried to write what Eddie has but I couldn't do it without sounding like a mad eugenicist. One example of how this is taking place is observed in the size of women's pelvises. It used to be that a woman with a small pelvis was more likely to die during child birth, however with modern medicine she is at no more risk than her "could give birth to a horse" sister. This is good news, and a narrow pelvis really isn't anything to worry about. Worst case, you have to have a c-section birth.
However, at the risk of being controversial, look at the Hapsburg family (and possibly it's modern descendents, I'm not saying anything!). Centuries of inbreeding resulted in haemophylia, slack jaws, reduced intellect and an increased susceptibility to illness. Luckily for them, wealth buys health and so they have survived to this day despite a "no skinny dipping" rule in their gene-pool. In the wild, they wouldn't have survived breeding in such a way. They would either have died out because of all the genetic defects that creep in, or they wouldn't have been breeding with their cousins in the first place.
And what about all the poor inbred dogs you see waddling about barely able to breathe? All because some moron decided that this breed of dog should have feet that turn a particular way and skinfolds on it's face.