This section is from the "A Vindication Of Natural Diet" book, by Percy Bysshe Shelley. Also see Amazon: A Vindication Of Natural Diet.
Was Nero a man of temperate life? Could you read calm health in his cheek, flushed with ungovernable propensities of hatred for the human race? Did Muley Ismael's pulse beat evenly, was his skin transparent, did his eyes beam with healthfulness, and its invariable concomitants, cheerfulness and benignity? Though history has decided none of these questions, a child could not hesitate to answer in the negative. Surely the bile-suffused cheek of Buonaparte, his wrinkled brow, and yellow eye, the ceaseless inquietude of his nervous system, speak no less plainly the character of his unresting ambition than his murders and his victories. It is impossible had Bonaparte descended from a race of vegetable feeders, that he could have either the inclination or the power to ascend the throne of the Bourbons. The desire of tyranny could scarcely be excited in the individual; the power to tyrannise would certainly not be delegated by a society neither frenzied by inebriation, nor rendered impotent or irrational by disease. Pregnant, indeed, with inexhaustible calamity is the renunciation of instinct, as it concerns our physical nature; arithmetic cannot enumerate, nor reason perhaps suspect, the multitudinous sources of disease in civilised life. Even common water, that apparently innoxious pabulum, when corrupted by the filth of populous cities, is a deadly and insidious destroyer.* Who can wonder that all the inducements held out by God himself in the Bible to virtue should have been vainer than a nurse's tale; and that those dogmas, apparently favourable to the intolerant and angry passions, should have alone been deemed essential; whilst Christians are in the daily practice of all those habits which have infected with disease and crime, not only the reprobate sons, but these favoured children of the common Father's love. Omnipotence itself could not save them from the consequences of this original and universal sin.
* See Dr. Lambe's "Report on Cancer".
There is no disease, bodily or mental, which adoption of vegetable diet and pure water has not infallibly mitigated, wherever the experiment has been fairly tried. Debility is gradually converted into strength, disease into healthful-ness: madness, in all its hideous variety, from the ravings of the fettered maniac, to the unaccountable irrationalities of ill-temper, that make a hell of domestic life, into a calm and considerable evenness of temper, that alone might offer a certain pledge of the future moral reformation of society. On a natural system of diet, old age would be our last and our only malady: the term of our existence would be protracted; we should enjoy life, and no longer preclude others from the enjoyment of it; all sensational delights would be infinitely more exquisite and perfect; the very sense of being would then be a continued pleasure, such as we now feel it in some few and favoured moments of our youth. By all that is sacred in our hopes for the human race, I conjure those who love happiness and truth, to give a fair trial to the vegetable system. Reasoning is surely superfluous on a subject whose merits an experience of six months would set for ever at rest. But it is only among the enlightened and benevolent that so great a sacrifice of appetite and prejudice can be expected, even though its ultimate excellence should not admit of dispute.
It is found easier, by the short-sighted victims of disease, to palliate their torments by medicine, than to prevent them by regimen. The vulgar of all ranks are invariably sensual and indocile; yet I cannot but feel myself persuaded, that when the benefits of vegetable diet are mathematically proved; when it is as clear, that those who live naturally are exempt from premature death, as that nine is not one, the most sottish of mankind will feel a preference towards a long and tranquil, contrasted with a short and painful life. On the average, out of sixty persons, four die in three years. In April, 1814, a statement will be given that sixty persons, all having lived more than three years on vegetables and pure water, are then in perfect health. More than two years have now elapsed; not one of them has died; no such example will be found in any sixty persons taken at random. Seventeen persons of all ages (the families of Dr. Lambe and Mr. Newton) have lived for seven years on this diet without a death, and almost without the slightest illness. Surely, when we consider that some of these were infants, and one a martyr to asthma, now nearly subdued, we may challenge any seventeen persons taken at random in this city to exhibit a parallel case. Those who may have been excited to question the rectitude of established habits of diet, by these loose remarks, should consult Mr. Newton's luminous and eloquent essay.* It is from that book, and from the conversation of its excellent and enlightened author, that I have derived the materials which I here present to the public.
* Return to Nature, or Defence of Vegetable Regimen. Cadell, 1811.
When these proofs come fairly before the world, and are clearly seen by all who understand arithmetic, it is scarcely possible that abstinence from aliments demonstrably pernicious should not become universal.
In proportion to the number of proselytes, so will be the weight of evidence; and when a thousand persons can be produced, living on vegetables and distilled water, who have to dread no disease but old age, the world will be compelled to regard animal flesh and fermented liquors as slow but certain poison. The change which would be produced by simpler habits on political economy is sufficiently remarkable. The monopolising eater of animal flesh would no longer destroy his constitution by devouring an acre at a meal, and many loaves of bread would cease to contribute to gout, madness, and apoplexy, in the shape of a pint of porter or a dram of gin, when appeasing the long-protracted famine of the hard-working peasant's hungry babes. The quantity of nutritious vegetable matter consumed in fattening the carcase of an ox, would afford ten times the sustenance, undepraving indeed, and incapable of generating disease, if gathered immediately from the bosom of the earth.
 
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