cui bono

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From Latin cui est bono? (to whom is it a benefit?).


cui bono (uncountable)

  1. The principle that the ultimate initiator of an action is likely the person who stands to gain from the action.
    • 1900, Evelyn Shuckburgh, Letters to Atticus, translation of original by Marcus Tullius Cicero:
      If the principle of cui bono is applied, it is evident that the gainers were the party of the triumvirs, whose popularity would be increased by a belief being created that their opponents the Optimates were prepared to adopt extreme measures to get rid of them.


Further reading[edit]

  • cui bono in The Century Dictionary, The Century Co., New York, 1911
  • cui bono at OneLook Dictionary Search



Borrowed from Latin cui bonō.


cui bono?

  1. who benefits?