Iago has a large appetite for revenge. In his perspective, he believes that it is he who should be in charge, not Othello the moor. This creates an anger in Iago, who entraps Othello in a web of deceit. He does this through a series of suggestions and hesitations that entice and implant images in Othello's head that lead to his demise. But what is more important is that he gives Othello the motive to murder innocent Desdemona. Iago is constantly like a puppet master, pulling the strings of the people around him.
There are many instances in the play where Iago is left by himself. He u…