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How am I then a villain, when this advice is free and honest, probal to thinking and indeed, the course to win the Moor again? His soul is so unfettered to Desdemona's love that she may, make, unmake, do what she list. Even as her appetites shall play God with his weak function. How am I then a villain? That counsels Cassio drove directly to his good. Divinity of Hell. When devils will their blackest sins put on, they do suggest at first with heavenly shows as I do now: for whiles this honest fool plies Desdemona to repair his fortunes and she for him pleads strongly to the Moor, I'll put this pestilence into his ear that she repeals him for her body's lust, and by how much she strives to do him good, she shall undo her credit with the Moor. So will I turn her virtue into pitch, and out of her own goodness make the net that shall enmesh them all.
~ Iago's monologue on his plan.
O, beware my lord, of jealousy! It is the green-eyed monster, which doth mock the meat it feeds on.
~ Iago to Othello.
Iago is the main antagonist in the tragedy play Othello by the late William Shakespeare. He is a Venetian soldier who serves under General Othello, a Moor (a broad term in Shakespeare's day, usually along the lines of someone of North African descent), and leader of the Venetian armed forces. He is a master manipulator who excels in pinpointing people's weaknesses, such as Othello's jealousy, Brabantio's racism, Roderigo's love for Desdemona, or Cassio's low alcohol tolerance, and uses these to his advantage, without anyone suspecting him, always believing him to be the most trustable person they know.
In the opening scene of the play Iago discusses his hatred of Othello with Roderigo, a young man Iago is taking advantage of (and money from) who wants Desdemona for himself. He explains that he was an experienced soldier and had served under Othello for many years, and thus was expecting to be promoted to the position of Othello's lieutenant. However, the less experienced Michael Cassio was given the position instead, largely for personal reasons, leaving Iago with the title of Ancient. The two of them then stir up Desdemona's father Brabantio, informing him that his daughter Desdemona has run away with Othello.
Brabantio accuses Othello, but his arguments are turned down by the Duke of Venice, as Othello is needed for an upcoming war. Othello and his army, with Desdemona by his side, then leave for Cyprus, leaving Roderigo and Iago alone. Roderigo mourns that he is no closer to Desdemona, and contemplates drowning himself, an idea Iago quickly convinces Roderigo to dismiss. He builds up Roderigo's hopes again, telling him to go and "Put money in thy purse" (Iago, Act 1 Scene 3). Roderigo goes off to sell his land, leaving Iago alone to give a soliloquy (a theatre element in which a character is alone on stage to reveal their innermost thoughts). He states he sees Roderigo as just a fool to be used, and that he hates Othello for losing the position of lieutenant, resulting in Iago now actively working against them both to gain Cassio's place ("To get his place, and plume up my will in double knavery." - Iago, Act 1 Scene 3). He also states that a rumour has been going around that Othello has slept with Iago's wife, Desdemona's lady Emilia, and make the decision to ruin Othello's life by convincing him that now Desdemona is having an affair with Cassio.
Iago begins his plan by getting Cassio drunk, which results in him attacking both Roderigo the Governor of Cyprus Montano, causing Othello to demote him "Cassio, I love thee, but nevermore be officer of mine" - Othello, Act 2 Scene 3). Iago then advises a disgraced Cassio that the best way to regain Othello's favor is to ask Desdemona to intercede on his behalf. Iago is with Othello when Desdemona requests Cassio's reinstatement, and here drops the first hints to Othello that Cassio and Desdemona may be dallying behind his back.
In the Third Act, as evidence, Iago has Emillia steal a handkerchief from Desdemona, which had been given to her by Othello as a special gift passed down to him. Iago then plants the handkerchief in Cassio's quarters. He then tells Othello that whilst sharing a room with him Iago heard Cassio dreaming of having an affair, and says he's certain he saw Cassio wipe his beard with the handkerchief. Othello makes the decision to disown his Christian God, and makes Iago his new lieutenant. Iago now has Othello right where he wants him, and tells him that "I am yours forever" (Iago, Act 3, Scene 3).
In Act 4 Cassio stumbles across Iago and Othello, whilst Othello has a fit in despair, during which Iago tells Cassio he'd like to speak with him shortly. Once Othello calms down Iago takes him to overhear Iago and Cassio, claiming he will, to aid Othello, figure out from Cassio where, when and when next he will sleep with Cassio, but then reveals to the audience that his real intention is to get Cassio talking about his mistress (or 'whore') Bianca, tricking Othello into thinking they are talking about Desdemona.
The plan works, as Iago and Cassio have a jolly discussion about Cassio's mistress and their exploits with one another, and sure enough, Othello thinks they are talking about Desdemona. Bianca then enters with the handkerchief and accuses Cassio of giving her a love-token given him by another woman. Bianca and Cassio both leave, and Othello, who recognizes the handkerchief, is thoroughly convinced, wanting both Cassio and his wife dead. Iago convinces Othello to strangle Desdemona in her bed and promises to arrange the death of Cassio.
Later on, Iago is brought in by Desdemona and Emilia, with Desdemona lamenting the change in her husband, and tells Iago that she has been accused of infidelity. Iago, again pretending to be an honest man, acts shocked and tells her that as Othello's closest friend he will do what he can to figure out what has gotten into him. Once Desdemona and Emilia exit, however, Iago is confronted by Roderigo, who lambastes Iago for not only taking all his money but also getting him no closer to Desdemona. Iago uses flattery and his keen manipulation skills to convince Roderigo to give him one more chance, where they plot to kill Cassio.
That night, Iago sends Roderigo to kill Cassio in an ambush attack. Cassio however, manages to escape with his life, albeit a severely wounded leg. Whilst everyone is in commotion with what has happened to Cassio, Iago kills Roderigo to stop him from talking.
At the same moment, in the final scene of the play, Othello smothers Desdemona to death. Emilia arrives on the scene and finds her lady murdered. Othello confesses to the murder and explains that she was unfaithful and that Iago knew of it all. Iago arrives with Montano and Gratiano, Desdemona's Uncle. Emilia interrogates Iago, who eventually reveals he did tell Othello that Desdemona cheated. Realizing his evil plot, Emilia reveals to everyone, despite threats from Iago, that she gave the handkerchief to her husband, after which Iago kills her and runs off, only to be captured and brought back by Cassio and his allies.
Realizing his mistake, a grief-stricken Othello runs at Iago, wounding him. Iago survives the attack, but Othello claims it is all for the better - death is better than life. He asks Cassio to ask Othello why Iago has ruined his life, but Iago refuses to explain his motive. Before Othello can be taken away he stabs himself and kisses Desdemona right before he dies. Cassio is left in charge, and the play ends with Iago being condemned to imprisonment and torture.
Iago presents himself as an honest and noble man, but this a front to hide his true colors, and gain the trust of others around him, most notably Othello, whom he despises ("I follow him to serve mine own turn." - Iago, Act 1 Scene 1). Out of a strong hatred for Othello, for numerous possible reasons, he makes the decision to ruin Othello's life by playing on Othello's jealousy and insecurities as an outsider in Cyprus, convincing him that his new Venetian wife Desdemona is having an affair with Cassio.
Iago is, in essence, a textbook psychopath. He has no qualms or concerns for the lives of others around him and shown to have an incredible talent for manipulating and exploiting the weakness of his enemies. He is cold and calculating, but he is also an opportunist with the ability to think on his feet.
Everyone around him sees Iago as an honest and decent man, who is not only seen as trustworthy by everyone but also usually the first person people turn to when things go wrong. But this is nothing but a ruse to make them easier to manipulate. He ridicules the idea of people putting their trust in others or having loyalty to someone, and in his eyes, the only good kind of servant is one who is only feigning loyalty to make their masters easier to manipulate.
Even after his scheme didn't go the way he planned, Iago never showed remorse; his decision not to speak being more because of shattered pride than anything else. Until the truth got revealed, Emila was the only one who knew of his true nature. Therefore, this shows how great at manipulating Iago truly is. If not for his wife, he would not have been found out.
There is a debate on why Iago decided to ruin Othello's life; while Shakespeare clearly established that Iago "hate[s] the Moor", he does not say what Iago's primary motivation is. There have been several different motives ascribed to him, including:
Rage over being passed up for promotion
Jealousy of Othello's success and happiness
Indignation over the rumor that Emilia is cheating on him with Othello
Sadistic enjoyment of creating chaos and causing other people harm
Feelings of personal betrayal by Othello, whom he considered a friend
Film and stage portrayals
Iago has been portrayed by several actors on stage and screen. They include:
Bob Hoskins (who also portrayed Mr. Smee in Hook).
Tim McInnerny (who also portrayed Kevin Darling in Blackadder Goes Forth).
Christopher Eccleston (who also portrayed Henry West in 28 Days Later, Raymond Calitri in Gone in 60 Seconds, Destro in G.I. Joe: The Rise of Cobra, The Ninth Doctor in Doctor Who and Malekith The Accursed in Thor: The Dark World) portrayed Ben Jago, a corrupt British policeman, in a modern adaptation of Othello that takes place in contemporary London.
Bob Hopkins as Iago in the 1981 BBC TV Movie of Othello.
Christopher Walken as Iago (Top) in the 1991 Shakespeare in the Park performance of Iago.
Iago (Kenneth Branagh) manipulates Othello.
Kenneth Branagh as Iago in the 1995 movie of Othello.
Andre Braugh as the first recordered performance of a black Iago.
Christopher Eccleston as Ben Jago, a modern interpretation of Iago in the updated 2001 movie 'Othello'.
Josh Harnett in an updated high school set version of Othello entitled O, as Hugo, Iago's counterpart.
Lucian Msamati as an uncommon black Iago in the 2015 Royal Shakespeare Company production of Othello.