This was spurred on by a few lines in a Neal Stephenson novel, probably Cryptonomicon. At one point, Stephenson describes a weed as a stupendous evolutionary badass because it, like every other living thing on earth, was the product of millions of years of winnowing.
So, I carried that thought in my mind for quite some time and my wife, an OB-GYN, tripped a connection. She was talking about the large numbers of women who need C-sections and the many different pregnancy complications that are continually part of her world. I thought, wait a minute, why are there so many faulty child-bearers out there?
After millions of years of winnowing, the trait of having an inadequate cervix, or lack of pushing force, or failure to begin labor should have been bred out long ago. It's only been the last fifty years or so that we could save women like that. Previously, they and their children would have overwhelmingly met their end in labor . . . and did.
Question for the evolutionists: Why aren't we blessed with a flock of women bearing babes with maximum efficiency? Why have the bad childbearing traits survived in such great numbers?