It’s got a lot to do with the devaluing of human life that makes abortion palatable for so many people.
Christianity holds all life as sacred. It doesn’t allow for killing babies because they’re deformed, or the wrong gender, or they’re inconvenient.
Christianity has the moral restraint on killing that doesn’t exist in other belief systems. In a survival of the fittest mentality, there is no reason to consider killing the defective as wrong because there is no moral base.
Not to mention the very hard work of evolutionists like Julian Huxley to legalize and promote abortion and euthanasia and so on.
There is nothing in the TOE that devalues human life. The TOE just talks about how our species (and others) got where it is today. Any atrocities we commit are done through our own free will and can't be blamed on a theory that does nothing but describe a certain portion of the physical world.