“Man alone consumes more flesh than all the other animals together devour; he is, then, the greatest destroyer; and this more from custom than necessity. Instead of using with moderation the blessings which are offered him, instead of disposing of them with equity, instead of increasing them in proportion as he destroys, the rich man places all his glory in consuming, in one day, at his table, as much as would be necessary to support many families: he equally abuses both animals and his fellow-creatures, some of whom remain starving and languishing in misery, and labour only to satisfy his immoderate appetite, and more insatiable vanity, and who, by destroying others through wantonness, destroys himself by excess. Nevertheless, man, like some other animals, might live on vegetables.”

Essay on the Principle of Population (1798; rev. through 1826)

Fragments of Markham's notes
The Nemesis of Faith (1849)
Context: A man is born into the world — a real man — such a one as it has never seen; he lives a life consistently the very highest; his wisdom is the calm earnest voice of humanity; to the worldly and the commonplace so exasperating, as forcing upon them their own worthlessness — to the good so admirable that every other faculty is absorbed in wonder. The one killed him. The other said, this is too good to be a man — this is God. His calm and simple life was not startling enough for their eager imagination; acts of mercy and kindness were not enough, unless they were beyond the power of man. To cure by ordinary means the bruised body, to lift again with deep sympathy of heart the sinking sinner was not enough. He must speak with power to matter as well as mind; eject diseases and eject devils with command. The means of ordinary birth, to the oriental conception of uncleanness, were too impure for such as he, and one so holy could never dissolve in the vulgar corruption of the grave.
Yet to save his example, to give reality to his sufferings, he was a man nevertheless. In him, as philosophy came in to incorporate the first imagination, was the fulness of humanity as well as the fulness of the Godhead. And out of this strange mixture they composed a being whose life is without instruction, whose example is still nothing, whose trial is but a helpless perplexity. The noble image of the man is effaced, is destroyed. Instead of a man to love and to follow, we have a man-god to worship. From being the example of devotion, he is its object; the religion of Christ ended with his life, and left us instead but the Christian religion.

Suppliants (tr. Edward P. Coleridge)

Emile, or On Education (1762), Book II

Memorial dedication (1902)

"Man's Place in the Animal World" (1869)

Literature and Ethics, entry for 1901
Journals 1889-1949

Source: Tarzan of the Apes (1912), Ch. 5 : The White Ape