Rubuta ci gaba ga wannan sakin layi - Bayan bala'in girgizar kasa ta Lisbon
(1 Nuwamba 1755), wanda ya faru shekaru da yawa bayan bugawar "Essais de Théodicée sur la bonté de Dieu, la liberté de l'homme et l'origine du mal" (1710), Leibniz's kyakkyawan zato da kuma theodicy sun jawo zargi mai yawa daga abokansa masu ilimin falsafa da kuma masana tauhidin Kirista. Masu sukar Leibniz, kamar Voltaire, sun yi jayayya cewa duniya tana da wahala da yawa don ba da hujja ga kyakkyawan fata. Duk da yake Leibniz yayi jayayya cewa wahala tana da kyau saboda tana motsa nufin mutum, masu sukar suna jayayya cewa matakin wahala ya yi yawa don tabbatar da imanin cewa Allah ya halicci "mafi kyawun dukkan duniyoyi". Leibniz kuma yana magance wannan damuwar ta hanyar la'akari da abin da Allah yake so ya faru (nufinsa na farko) da abin da Allah ya ba da damar faruwa (nufinsa na gaba). Wasu, kamar su masanin falsafar kirista Alvin Plantinga, sun soki theodicy na Leibniz ta hanyar jayayya cewa mai yiwuwa babu wani abu kamar "mafi kyau" na dukkan duniyoyi masu yiwuwa, tunda mutum koyaushe zai iya tunanin duniya mafi kyau, kamar duniya tare da mutum ɗaya mafi adalci.