Question: what are iago and roderigo arguing about?
Answer: Act 1 Scene 1 The play opens as Iago is telling Roderigo that he hates Othello because Othello has promoted Cassio to be his lieutenant instead of him, even though Cassio 'never set a squadron in the field' and has much less experience. Iago tells Roderigo 'I follow him to serve my turn upon him'.