Homo homini lupus, or in its unabridged form Homo homini lupus est, is a Latin proverb meaning “A man is a wolf to another man,” or more tersely “Man is wolf to man.”

(“Homo Homini Lupus” 2022)

References

“Homo Homini Lupus.” 2022. Wikipedia, January. https://en.wikipedia.org/w/index.php?title=Homo_homini_lupus&oldid=1064950812.