In the pursuit of every enjoyment, whether sensual or intellectual, reason, that faculty which enables us to calculate consequences, is the proper corrective and guide. It is probable therefore that improved reason will always tend to prevent the abuse of sensual pleasures, though it by no means follows that it will extinguish them. I have endeavoured to expose the fallacy of that argument which infers an unlimited progress from a partial improvement, the limits of which cannot be exactly ascertained. It has appeared, I think, that there are many instances in which a decided progress has been observed, where yet it would be a gross absurdity to suppose that progress indefinite. But towards the extinction of the passion between the sexes, no observable progress whatever has hitherto been made. To suppose such an extinction, therefore, is merely to offer an unfounded conjecture, unsupported by any philosophical probabilities. It is a truth, which history I am afraid makes too clear, that some men of the highest mental powers have been addicted not only to a moderate, but even to an immoderate indulgence in the pleasures of sensual love. But allowing, as I should be inclined to do, notwithstanding numerous instances to the contrary, that great intellectual exertions tend to diminish the empire of this passion over man, it is evident that the mass of mankind must be improved more highly than the brightest ornaments of the species at present before any difference can take place sufficient sensibly to affect population. I would by no means suppose that the mass of mankind has reached its term of improvement, but the principal argument of this essay tends to place in a strong point of view the improbability that the lower classes of people in any country should ever be sufficiently free from want and labour to obtain any high degree of intellectual improvement. CHAPTER 12 Mr Godwin's conjecture concerning the indefinite prolongation of human life--Improper inference drawn from the effects of mental stimulants on the human frame, illustrated in various instances--Conjectures not founded on any indications in the past not to be considered as philosophical conjectures--Mr Godwin's and Mr Condorcet's conjecture respecting the approach of man towards immortality on earth, a curious instance of the inconsistency of scepticism. Mr Godwin's conjecture respecting the future approach of man towards immortality on earth seems to be rather oddly placed in a chapter which professes to remove the objection to his system of equality from the principle of population. Unless he supposes the passion between the sexes to decrease faster than the duration of life increases, the earth would be more encumbered than ever. But leaving this difficulty to Mr Godwin, let us examine a few of the appearances from which the probable immortality of man is inferred.