Kant scholars have rarely addressed the notion of optimism as it was interpreted by the Königsbergian philosopher in the mid-18th century. The notion originates from Leibniz’s Theodicy and from debates over whether the actual world is the best of all possible worlds. The first of a two-part series, this article studies the historical context in which appeared Kant’s 1759 lecture advertisement leaflet entitled An Attempt at Some Reflections on Optimism. The study describes the requirements of the 1755 Berlin Academy of Sciences’ competition for a comparison of G. W. Leibniz’s and A. Pope’s systems and an assessment of optimism. Another focus is the philological difficulties of translating Pope’s proposition “Whatever is, is right” into the ...