is a master manipulator He uses his knowledge to control those around him He believes that he deserves the promotion more than Cassio He is jealous of Cassio and this jealousy fuels his desire for revenge So we find him saying I have told thee often and I re-tell thee again and again I hate the Moor He convinces Othello that his wife is unfaithful despite no evidence supporting this claim He also manipulates Cassio into getting drunk and losing his job Deception Iago is a skilled liar able to convince those around him of almost anything He lies to Othello telling him that Desdemona is unfaithful and also lies to Roderigo about his plans for their joint venture Iago is able to manipulate Roderigo who is in love with Desdemona Iago is helping him win the love of Desdemona He convinces Roderigo to give him money which he uses to further his own interests He convinces Roderigo to aid him in his schemes by promising him that Desdemona will fall in love with him if they disrupt Othello's happiness Iago cunningly declares Thus do I ever make my fool my purse Lack of Conscience Iago does whatever it takes to achieve his goals He has no remorse about destroying other people's lives or causing them pain Iago doubts his wife Emilia He suspects that she maintains a secret illicit relationship with Othello So he decides to destroy the conjugal life of Othello and Desdemona For this he uses Cassio He tells him to go to Desdemona and request her in his favour to Othello So Cassio goes to her Here Iago manipulates Othello by playing on his insecurities about his marriage to Desdemona He plants seeds of doubt in Othello's mind making him believe that Desdemona is unfaithful Look to your wife observe her well with Cassio Towards the end Othello kills Desdemona by the influence of Iago When everything becomes clear to him after killing Desdemona he commits suicide Iago's Machiavellian nature is evident throughout Othello He is a complex and fascinating character one who embodies the worst aspects of human nature