"Evil, by definition, is that which endangers the good, and the good is what we perceive as a value"
About this Quote
Coming from Lorenz, a founder of ethology, that’s not accidental. He’s speaking from a worldview built on behavior, adaptation, and the machinery of instincts. The subtext is almost clinical: moral categories are downstream of cognition and group life. What counts as “good” is tied to what a community has learned to protect (children, kin, status, territory, norms). “Evil” then becomes the name we give to forces - people, ideologies, rival groups, even our own impulses - that jeopardize those protections.
There’s an uncomfortable edge here. If good is perception, then moral certainty starts to look like a well-lit prejudice: values can be noble or parochial, and “evil” can be an honest alarm or a convenient label for enemies. Lorenz’s intent isn’t to excuse cruelty; it’s to naturalize moral panic, to show how easily ethics becomes a defense mechanism. In the 20th century’s shadow, that’s less abstract philosophy than a warning about how quickly threatened values turn into righteous violence.
Quote Details
| Topic | Ethics & Morality |
|---|---|
| Source | Help us find the source |
| Cite |
Citation Formats
APA Style (7th ed.)
Lorenz, Konrad. (2026, January 17). Evil, by definition, is that which endangers the good, and the good is what we perceive as a value. FixQuotes. https://fixquotes.com/quotes/evil-by-definition-is-that-which-endangers-the-68874/
Chicago Style
Lorenz, Konrad. "Evil, by definition, is that which endangers the good, and the good is what we perceive as a value." FixQuotes. January 17, 2026. https://fixquotes.com/quotes/evil-by-definition-is-that-which-endangers-the-68874/.
MLA Style (9th ed.)
"Evil, by definition, is that which endangers the good, and the good is what we perceive as a value." FixQuotes, 17 Jan. 2026, https://fixquotes.com/quotes/evil-by-definition-is-that-which-endangers-the-68874/. Accessed 12 Feb. 2026.










