Authors:

Some determined advocates of the vegetable system maintain, that the teeth and stomach of the monkey correspond, in structure, very closely with that of man, yet it lives on fruits - therefore if man followed nature, he would live on fruits and vegetables. But though the anatomical likeness between man and monkeys is striking, yet it is not complete; the difference may be and doubtless is precisely that which makes a difference of diet necessary to nourish and develope their dissimilar natures. Those who should live as the monkeys do would most closely resemble them.

Sarah Josepha Buell Hale (1851). “The Way to Live Well: And to be Well While We Live, Containing Directions for Choosing and Preparing Food in Regard to Health, Economy, and Taste”, p.19
Some determined advocates of the vegetable system maintain, that the teeth and stomach of the monkey correspond, in structure, very closely with that of man, yet it lives on fruits - therefore if man followed nature, he