Why does lago manipulate others?

Iago manipulates others primarily out of jealousy and a desire for power. He feels overlooked and seeks to undermine those he perceives as superior, particularly Othello and Cassio. His cunning and deceitful nature enable him to exploit the weaknesses and insecurities of those around him, allowing him to orchestrate their downfall while advancing his own interests. Ultimately, Iago's manipulation stems from a deep-seated resentment and a need for control.