Explain why it s controversial and why it matters. Preferably, this should come immediately after you define the controversy. State as clearly as possible the response to the controversy that you will defend. Present your supporting arguments for your thesis. Keep the structure of the argument clear.
Argumentation aims to win over strong objectors.
If you can win them over, or at least cause them to reconsider the issue, then you will surely win over others. Briefly restate your thesis and the main supporting reasons you have for believing it.