The debate over abortion rights and birth control stems from our most basic instincts, filtered through our language and thought processes.
The hardest hard core opposes all abortion and birth control. You copulate, you live with the consequences. That is a very naturalistic viewpoint, albeit frequently espoused by people who claim that dominion over all of nature was granted to us by a deity. We can selectively breed any species but our own. Our own species must proliferate without restraint, to be selectively killed in arguments over esoteric points of philosophy, or conflict over possession of natural resources.
A debatable theory that the use of cesarean section births has already shaped physical evolution points out that pregnancy and childbirth would be fatal to some women. In the naturalistic view, these deaths are necessary to purge those defective genes. If God had meant those women to survive, He would have given them wider pelvises.
From a practical standpoint, if we develop a significant population that can only give birth surgically, we have created a dependent group that will die out if they are cut off from medical facilities at the wrong time. This can happen in a number of ways, not least of which is by cutting health care in a developed nation, or by the collapse of civilization in general as a result of an overblown argument about esoteric points of philosophy, or conflict over possession of natural resources.
Fertility is destiny in a world without birth control. Conceive and be replicated, or conceive and be eliminated. The so-called sexual revolution granted control over fertility to those most affected by it. Horny people, mostly men, hoped that this would lead to lots of recreational copulation. Control-freak prudes seize on that aspect alone to excoriate it as the foulest sin. In all the smoke and chaos of that debate, the fact that fertility control gives women the freedom to live productive non-sexual lives is submerged in the swinging melee of religious symbols and insults.
The control freaks say that a woman who wants to live a non-sexual life can simply refuse to participate in sex. No other mitigation is necessary. Reality constantly refutes this.
Everything that affects birth and death shapes evolution. Because humans react to ideas, not just to the passage of genetic material and the survival of better or worse hunters and gatherers, social and political choices shape whether the species of tomorrow goes upward and outward on intellectual advancement or devolves into superstitious hunters and gatherers again.
Our instincts constantly speak to our intellect in ancient, wordless ways we often do not recognize as the primitive promptings that they are. We call this the subconscious. Sometimes the subconscious draws on intellectual concepts running subroutines, but more often you can find the biological prompting that predates the invention of words. The ancient world called. It wants its species back.