“Disease is contagious, and death an unavoidable necessity. Pleasure is often exhausting, and life is everywhere interpolated with pain. Droughts, darknesses, floods, pestilences, storms, and scourges harrow the earth from one pole of it to the other. The earth is, and always has been, peopled by deformities—creatures so defective in their natures that they visit upon each other without hesitancy crimes and barbarities of the most horrible hue. These wretches are compelled to pass their lives in the midst of a universe so mysterious and mighty that the most arrogant of us are helpless in the crash and melee of its tendencies. Yet human contemplators look out over this dark and contentious chaos and declare it to be without spot or blemish.”

Source: Orlando

" The Unconscious Holocaust https://archive.org/details/theunconsciousholocaust-jhowardmoore", Good Health: A Journal of Hygiene, Vol 32, Iss. 2, 1 Feb. 1897, p. 75

Cults, Sects and Questions (c. 1979)

Funeral oration for John Peter Altgeld (14 March 1902); published in an appendix to The Story of My Life (1932)

Nobel lecture (1989)
Context: Because we all share this small planet earth, we have to learn to live in harmony and peace with each other and with nature. That is not just a dream, but a necessity. We are dependent on each other in so many ways, that we can no longer live in isolated communities and ignore what is happening outside those communities, and we must share the good fortune that we enjoy.

"The Factors of Organic Evolution", p. 35
The Universal Kinship (1906), The Physical Kinship

Variant: God has cared for these trees, saved them from drought, disease, avalanches, and a thousand tempests and floods. But he cannot save them from fool
Source: 1900s, Our National Parks (1901), chapter 10: The American Forests <!-- Terry Gifford, EWDB, pages 604-605 -->
Context: Any fool can destroy trees. They cannot run away; and if they could, they would still be destroyed — chased and hunted down as long as fun or a dollar could be got out of their bark hides, branching horns, or magnificent bole backbones. Few that fell trees plant them; nor would planting avail much towards getting back anything like the noble primeval forests. … It took more than three thousand years to make some of the trees in these Western woods — trees that are still standing in perfect strength and beauty, waving and singing in the mighty forests of the Sierra. Through all the wonderful, eventful centuries … God has cared for these trees, saved them from drought, disease, avalanches, and a thousand straining, leveling tempests and floods; but he cannot save them from fools — only Uncle Sam can do that.

"Of the Cruelty of Man"
The Notebooks of Leonardo da Vinci (1883), XX Humorous Writings
Context: Animals will be seen on the earth who will always be fighting against each other with the greatest loss and frequent deaths on each side. And there will be no end to their malignity; by their strong limbs we shall see a great portion of the trees of the vast forests laid low throughout the universe; and, when they are filled with food the satisfaction of their desires will be to deal death and grief and labour and wars and fury to every living thing; and from their immoderate pride they will desire to rise towards heaven, but the too great weight of their limbs will keep them down. Nothing will remain on earth, or under the earth or in the waters which will not be persecuted, disturbed and spoiled, and those of one country removed into another. And their bodies will become the sepulture and means of transit of all they have killed.
O Earth! why dost thou not open and engulf them in the fissures of thy vast abyss and caverns, and no longer display in the sight of heaven such a cruel and horrible monster.