"In spite of everything he said, I felt sure he was showing us that our population explosion is a social problem, like, say, crime or race schism. I failed to hear him say that our population explosion is a biological problem, that if we pursue a policy that would be fatal for any species, then it will fatal for us in exactly the same way. We can’t will it to be otherwise. We can’t say, “Well, yes, our civilization is built on an evolutionarily unstable strategy but we can make it work anyhow, because we’re humans.” The world will not make an exception for us. And of course what the Church teaches is that God will make an exception for us. God will let us behave in a way that would be fatal for any other species, will somehow “fix it” so we can live in a way that is in a very real sense of self-eliminating. That is like expecting God to make our airplanes fly even if they’re aerodynamically incapable of flight."