If we are a product of unguided natural selection, then why should we care if humans survive? There’s no purpose to life if Darwinian evolution is to be believed. So why bother supporting a moral ‘ought’ if determinism reigns supreme?
The entire purpose of evolution is to adapt to changes in our environment to gain and maintain the ability to survive. Abortion runs counter to that purpose on several levels. A belief in a supernatural afterlife is unnecessary to have purpose. Our true afterlife is contained within our progeny. Destroying them destroys our purpose: to learn, adapt, teach, and improve ourselves to improve our future generations. Consider the purpose of developing an iPhone 7 when there was already an iPhone 6. What we create is a reflection of what we are. Simply stated, our purpose is to become better than we are today. If we don’t survive, we cannot realize our purpose.
You see, it’s not about you, it’s about them (our future generations). You are surviving by passing along your genes. Each of us are ultimately individual cells belonging to the organism ‘homosapiens’. Your individual body works the same way. Billions of cells die each day and billions are created, and your body continues to exist. Your body’s existence is their purpose. Once again, our purpose is to sustain the ‘body’ of our species and improve it along the way. Think of all we owe those who came before us and innovated because they survived.
Whether we end abortion to increase our chances of survival or we end it because it’s morally wrong, the end result is the same. We continue to meet our purpose to sustain the ‘body’ of our species.