“Except in children, there remain no traces of that instinct which determines, in all other animals, what aliment is _natural_ or otherwise; and so perfectly obliterated are they in the reasoning adults of our species, that it has become necessary to urge considerations drawn from comparative anatomy to prove that we are _naturally_ frugivorous. “Crime is madness. Madness is disease. Whenever the cause of disease shall be discovered, the root from which all vice and misery have so long overshadowed the Globe will be bare to the axe. All the exertions of man, from that moment, may be considered as tending to the clear profit of his species. No sane mind in a sane body resolves upon real crime.... The system of a simple diet promises no Utopian advantages. It is no mere reform of legislation, whilst the furious passions and evil propensities of the human heart, in which it had its origin, are still unassuaged. It _strikes at the root of all evil_, and is an experiment which may be tried with success, not alone by nations, but by small societies, families, and even individuals. In no cases has a return to vegetable diet produced the slightest injury; in most it has been attended with changes undeniably beneficial. Should ever a physician be born with the genius of Locke, I am persuaded that he might trace all bodily and mental derangements to our unnatural habits as clearly as that philosopher has traced all knowledge to sensation....