Now, if the population of a place in which the fecundity is less and the mortality greater than in other places still goes on increasing by propagation, it follows that in other places the population will increase, and increase still faster. There is clearly nothing in Mr Sadler's boasted law of fecundity which will keep the population from multiplying till the whole earth is as thick with human beings as St Giles's parish. If Mr Sadler denies this, he must hold that, in places less thickly peopled than London, marriages may be less fruitful than in London, which is directly contrary to his own principles; or that in places less thickly peopled than London, and similarly situated, people will die faster than in London, which is again directly contrary to his own principles. Now, if it follows, as it clearly does follow, from Mr Sadler's own doctrines, that the human race might be stowed together by three or four hundred to the acre, and might still, as far as the principle of propagation is concerned, go on increasing, what advantage, in a religious or moral point of view, has his theory over that of Mr Malthus? The principle of Mr Malthus, says Mr Sadler, leads to consequences of the most frightful description. Be it so. But do not all these consequences spring equally from his own principle? Revealed religion condemns Mr Malthus. Be it so. But Mr Sadler must share in the reproach of heresy. The theory of Mr Malthus represents the Deity as a Dionysius hanging the sword over the heads of his trembling slaves. Be it so. But under what rhetorical figure are we to represent the Deity of Mr Sadler? A man who wishes to serve the cause of religion ought to hesitate long before he stakes the truth of religion on the event of a controversy respecting facts in the physical world. For a time he may succeed in making a theory which he dislikes unpopular by persuading the public that it contradicts the Scriptures and is inconsistent with the attributes of the Deity. But, if at last an overwhelming force of evidence proves this maligned theory to be true, what is the effect of the arguments by which the objector has attempted to prove that it is irreconcilable with natural and revealed religion? Merely this, to make men infidels. Like the Israelites, in their battle with the Philistines, he has presumptuously and without warrant brought down the ark of God into the camp as a means of ensuring victory:--and the consequence of this profanation is that, when the battle is lost, the ark is taken.