The real history of the world is full of the queerest cases of notions that have turned clean head-over-heels and completely contradicted themselves. The last example is an extraordinary notion that what is called Birth Control is a social reform that goes along with other social reforms favoured by progressive people.
It is rather like saying that cutting off King Charles’ head was one of the most elegant of the Cavalier fashions in hair-dressing. It is like saying that decapitation is an advance on dentistry. It may or may not be right to cut off the King’s head; it may or may not be right to cut off your own head when you have the toothache. But anybody ought to be able to see that if we once simplify things by head cutting we can do without hair-cutting; that it will be needless to practise dentistry on the dead or philanthropy on the unborn–or the unbegotten. So it is not a provision for our descendants to say that the destruction of our descendants will render it unnecessary to provide them with anything. It may be that it is only destruction in the sense of negation; and it may be that few of our descendants may be allowed to survive. But it is obvious that the negation is a piece of mere pessimism, opposing itself to the more optimistic notion that something can be done for the whole family of man. Nor is it surprising to anybody who can think, to discover that this is exactly what really happened.
– G. K. Chesterton