The term theodicy comes from the Greek θεός (theós, "god") and δίκη (díkē, "justice"), meaning literally "the justice of God," although a more appropriate phrase may be "to justify God" or "the justification of God." The term was coined in 1710 by the German philosopher Gottfried Leibniz in a work entitled Essais de Théodicée sur la bonté de Dieu, la liberté de l'homme et l'origine du mal (published in English as Theodicy: Essays on the Goodness of God, the Freedom of Man, and the Origin of Evil). The purpose of the essay was to show that the evil in the world does not conflict with the goodness of God, and that notwithstanding its many evils, the world is the best of all possible worlds (Optimism).
- Gottfried Wilhelm Leibniz, Austin Marsden Farrer (editor), E. M. Huggard (translator), Theodicy: Essays on the Goodness of God, the Freedom of Man, and the Origin of Evil. ISBN 978-0875484372
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