This teaching covers the wrath of God to the unjust in the day of God’s judgement. It also explains how they exchanged the glory of God for idols and exchanged the truth of God for a lie. They started in idolatry and ended up in homosexuality despite knowing God’s standard of justice so they were inexcusable. Then, in Chapter 3, it is covered that man’s justification was needed because none were righteous and all were guilty before God.