Fortunato has several character flaws that lead to his death in "The Cask of Amontillado." First and foremost is Fortunato's cluelessness concerning the depths of Montresor's hatred and desire for revenge. Fortunato should have been wary of Montresor's intent due to the "thousand injuries" he had apparently bestowed upon him. Instead, it was Fortunato's other "weak point"--his great love of wine--that blinded him to Montresor's actual motives. Fortunato also made the mistake of following Montresor on a night when he was inebriated due to the "supreme madness of the carnival season." Fortunato's drunken state robbed him of the good sense and reason that he would normally have possessed. Montresor's perfect crime was enacted successfully because he had already planned his actions based on these flaws, faults he knew would successfully allow Fortunato to willingly follow him just about anywhere in order to taste the rare vintage of Amontillado.