Answer:
Yes, Othello's behavior in William Shakespeare's Othello has many unintended consequences that drive the plot forward and lead to his downfall:
Murder of Desdemona
Othello's irrational jealousy and inability to trust his wife, Desdemona, lead him to believe the villain Iago's lies about an affair with his lieutenant, Michael Cassio. Othello murders Desdemona in a jealous rage and then takes his own life.
Death of Roderigo
Othello's sadistic behavior also leads to the death of his loyal friend, Roderigo.
Cassio's loss of position
Othello's behavior also ruins Cassio's professional reputation when he loses his position as Othello's lieutenant.
Desdemona's lie
Othello's behavior also causes Desdemona to act out of character by lying about a handkerchief, which hardens Othello's suspicions against her.