“The wars ended when there were no longer two societies left to fight against each other.”

The Spirit of Revolt (1880)
Context: In periods of frenzied haste toward wealth, of feverish speculation and of crisis, of the sudden downfall of great industries and the ephemeral expansion of other branches of production, of scandalous fortunes amassed in a few years and dissipated as quickly, it becomes evident that the economic institutions which control production and exchange are far from giving to society the prosperity which they are supposed to guarantee; they produce precisely the opposite result. … Human society is seen to be splitting more and more into two hostile camps, and at the same time to be subdividing into thousands of small groups waging merciless war against each other. Weary of these wars, weary of the miseries which they cause, society rushes to seek a new organization; it clamors loudly for a complete remodeling of the system of property ownership, of production, of exchange and all economic relations which spring from it.

Technopoly: the Surrender of Culture to Technology (1992)
Context: We can imagine that Thamus [or Amun: this is a reference to a discussion on the value of writing in Plato's Phaedrus] would also have pointed out to Gutenberg, as he did to Theuth, that the new invention would create a vast population of readers who "will receive a quantity of information without proper instruction... with the conceit of wisdom instead of real wisdom"; that reading, in other words, will compete with older forms of learning. This is yet another principle of technological change we may infer from the judgment of Thamus: new technologies compete with old ones — for time, for attention, for money, for prestige, but mostly for dominance of their world-view. This competition is implicit once we acknowledge that the medium contains an ideological bias. And it is a fierce competition, as only ideological competitions can be. It is not merely a matter of tool against tool — the alphabet attacking ideographic writing, the printing press attacking the illuminated manuscript, the photograph attacking the art of painting, television attacking the printed word. When media make war against each other, it is a case of world-views in collision.

"The Price of Empire" speech, to the meeting of the American Bar Association in Hawaii (August 1967), in Haynes Bonner Johnson and Bernard M. Gwertzman, Fulbright: The Dissenter (1968), p. 305.

Others
Source: [Andrew Soltis, Soltis, Andy, The Great Chess Tournaments and Their Stories, 133, New York 1927 • The End of Chess?, 1975, Chilton Book Company, 0-8019-6138-6]

Quoted by Emma Goldman in her essay, "Patriotism: A Menace to Liberty", chapter five of Anarchism and Other Essays (2nd revised edition, 1911).
Attributed

Jussi Halla-aho (2006), translation published in the blog Multicultural Discourse in Finland and Sweden http://gatesofvienna.blogspot.ch/2006/08/multicultural-discourse-in-finland-and.html, August 30, 2006
2005-09

Source: The Golden Lily

"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.