On Napoleon Having to Know the Fate of Field Marshall Rehnskiold When the Latter Invaded Russia at the Tail-End of the Great Northern War and Hitler Having to Know the Fate of Both of Them After Napoleon Made the Same Boneheaded Calculation as Rehnskiold and Yet Neither Napoleon nor Hitler Learned a Damned Thing from Their Predecessors' Grave Mistakes

I suppose that ignorance could have been the primary factor but being that history is littered with psychopaths, my money's on hubris with no hedging needed.