God reveals his wrath against all the sin of mankind. What is the sin of mankind? It is the godlessness and wickedness of people who suppress the truth by their wickedness. What truth do they suppress? They suppress the truth of God. Despite God making his eternal power and divine nature known through his creation, despite revealing the power of God to bring salvation to all who believe the gospel, people refuse to believe. They refuse to glorify God, and they refuse to thank him. People wrongly transfer the wisdom and greatness of God to themselves. Then, they foolishly create idols that they worship rather than worshipping the true God.
God's wrath is a terrible thing. It isn't like when a parent is angry because a child misbehaves but still indulges them. God's wrath is the giving over of the objects of his wrath to their sin. It's as though God says, "OK, you want to sin instead of worshipping me? Fine! I abandon you to your sin." People have nowhere to go but their sinful depravity: their sexual immorality, idol worship, arrogance, and boastfulness. And they not only do these things, but they approve of others who do them!
Application: Father, because of our godlessness and wickedness, you reveal your wrath. Father, we need Jesus, our Savior, in order to be restored to you.
One Word: Glorify God and give thanks to him