In William Shakespeare's play Othello, Iago manipulates others through lies and deception. He turns Othello against his wife Desdemona by convincing Othello that Desdemona is unfaithful with Cassio. Iago also manipulates Roderigo by telling him he can win Desdemona if he helps get rid of Cassio. Iago's manipulation stems from jealousy over being passed over for a promotion and causes tragedy for other characters in the play before his schemes are finally revealed.