, ▁discuss ing ▁a ▁variety ▁of ▁concepts ▁in ▁short ▁paragraph s ▁or ▁say ings . ▁Ref lect ing ▁an ▁adm iration ▁of ▁Vol taire ▁as ▁a ▁free ▁think er , ▁but ▁also ▁a ▁break ▁in ▁his ▁friendship ▁with ▁composer ▁Richard ▁Wagner ▁two ▁years ▁earlier , ▁N iet z sche ▁dedicated ▁the ▁original ▁ 1 8 7 8 ▁edition ▁of ▁Human , ▁All ▁To o ▁Human ▁“ to ▁the ▁memory ▁of ▁Vol taire ▁on ▁the ▁celebr ation ▁of ▁the ▁anni versary ▁of ▁his ▁death , ▁May ▁ 3 0 , ▁ 1 7 7 8 .” ▁Instead ▁of ▁a ▁pre face , ▁the ▁first ▁part ▁originally ▁included ▁a ▁quot ation ▁from ▁Des cart es ' s ▁Disc ourse ▁on ▁the ▁Method . ▁N iet z sche ▁later ▁repub lished ▁all ▁three ▁parts ▁as ▁a ▁two - volume ▁edition ▁in ▁ 1 8 8 6 , ▁adding ▁a ▁pre face ▁to ▁each ▁volume , ▁and ▁removing ▁the ▁Des cart es ▁quote ▁as ▁well ▁as ▁the ▁dedic ation ▁to ▁Vol taire . ▁ ▁N iet z sche ▁in ▁ 1 8 7 6 ▁In ▁ 1 8 7 6 ▁N iet z sche ▁broke ▁with ▁Wagner , ▁and ▁in ▁the ▁same ▁year ▁his ▁increasing ly ▁bad ▁health ▁( poss ibly ▁the ▁early ▁effects ▁of ▁a ▁brain ▁tum or ) ▁comp elled ▁him ▁to ▁request ▁a ▁leave ▁of ▁absence ▁from ▁his ▁academic ▁duties ▁at ▁the ▁University ▁of ▁Bas el . ▁ ▁In ▁the ▁aut umn ▁of ▁ 1 8 7 6 ▁he ▁joined ▁his ▁friend ▁Paul ▁R