Unequivocally, Iago plays an important and major function in the tragedy of Othello. By the end of the play, Iago has been directly responsible for the deaths of Roderigo, Emilia and the protagonist and his love. Iago's importance to the play is revealed by his contribution to the plot and his significance relative to other characters. Iago's function, which invariably adds to the importance he has on the play, is to lead to the downfall of Othello therefore revealing the themes of hate, jealousy and revenge. Iago also serves to contrast with ....