In Othello, in the last play this evil is quite exceptionally intense, unmitigated form. Othello is characterized by an unusually rich and complex infusion of irony, which takes distinctive forms.
In general we agree the fact that every action of men and women has got its own reaction the same principle applies to the characters of the Othello. Othello is not solely responsible for the tragic consequence of the play.It was Iago who was responsible for the tragic action of the play. Iago is Shakespeare's outstanding 'villain', his supreme, individual representation of evil. Iago can be said in this way- the chief, and probably most debatable , regarded as 'demi-devil'(Othello's final description of him), an agent of sheer , devastating evil, and how far as a man activated by credible and comprehensible human motives.
He works through the neo-Aristotelian categories (fables, characters, thoughts, manners, words) and attacks Othello under each head. His most bitter criticism are that the characters are unnatural therefore impossible and inconsistent. Therefore all the other 'parts' are necessarily flawed. An additional weakness is that Shakespeare has neglected morality. Iago's Villainy is too shacking to be represented in the theatre; and poetic justice is not observed for, Desdemona is killed, yet innocent. He goes on to add that "Shakespeare allows characters to be killed in a barbarous arbitrary wayhobnabagainst all justice and reason... against all law, humanity and nature"
Othello is a noble man, one who has grace with the ladies but also possesses all the virtues of a military leader that he is. He is a general that is experienced in battle. His valiant personality is what draws people to him, as it does for Desdemona. The senators value him and hear what he speaks. This is shown here by one of the senators. "Here comes Brabantio's and the valiant Moor",(Act1 scene 3, 47).
Not only does him posses' great character and courage, but also dignity. He keeps his control even he is being accused of witchcraft during the first encounter with the senators when Desdemona's father confronts him about see his daughter.
"Most potent, grave and revered signors,
My very noble and approved good masters;
That I have ta'en away this old man's daughter,
It is most true; true I have married her.
The very head and front of my offending
Hath the extent, no more. Rude I am in my speech,
And little blessed with the soft phrase of peace ;"( 1, 3, and 91)
A major sign that Othello shows his rage and jealousy occurs in Act iii, scene3, when lago is talking with Othello and tells him that Desdemona is a whore. Othello's breakdown, almost to choke lago, simply asks Iago,
"Villain, be sure thou prove my love a whore, be sure if
It. Give me the ocular proof. Or by the worth of mine