We must recognize that war is common, strife is justice, and all things happen according to strife and necessity.
War is father of all and king of all; and some he manifested as gods, some as men; some he made slaves, some free.-- Heraclitus of Ephesus (c. 535 – c. 475 BC)
It sounds like the work of Conan, the barbarian.
The state of nature is war of all against all.
“...no knowledge of the face of the earth, no account of time, no arts, no letters, no society, and which is worst of all, continual fear and danger of violent death, and the life of man, solitary, poor, nasty, brutish, and short.”
Thomas Hobbes, Leviathan
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<>The results, published in Scientific Reports on May 27, 2021, show that it was not a single armed conflict but rather a succession of violent episodes, probably exacerbated by climate change.<>