Fiat iustitia, et pereat mundus is a Latin phrase, meaning "Let justice be done, and the world perish".
[1] This sentence was the motto of Ferdinand I, Holy Roman Emperor (1556–1564),[2] who used it as his slogan, and it became an important rule to control the nation.
"[1] A famous use is by Immanuel Kant, in his 1795 Perpetual Peace: A Philosophical Sketch (German: Zum ewigen Frieden.
Ein philosophischer Entwurf), to summarize the counter-utilitarian nature of his moral philosophy, in the form Fiat justitia, pereat mundus, which he paraphrases as "Let justice reign even if all the rascals in the world should perish from it.
"[5][6][7] Ludwig von Mises wrote in Human Action, "The utilitarian economist does not say: Fiat justitia, pereat mundus.