Beginning of Essay
Iago's crimes define pathological jealousy and a sheer desire for revenge. His acts are pre-meditated and have reasons. In various soliloquies, he reveals grudges that, while mostly false or overblown, present themselves as clear to Iago. Iago masters duplicity, ....

Middle of Essay
.... to the person responsible. That person is Othello. Othello chooses Michael Cassio, whom Iago denounces as "a Florentine." (line 21) Iago has been beaten by a Florentine with (as Iago thinks) less military ability than him. This deep wound commands Iago to revenge. Iago cannot bear Othello's being a superior figure. Iago comments on Othello's going to war as "Another of his fathom they have none/ To lead their business." (lines 153-154) Iago insults Othello's skin color profusely behind his back. As the first part of his plan, Iago seeks to arouse Brabantio to the fact that the Moor has "robbed" (line 88) him of his daughter. Iago refers to Othel ....