18 “For the wrath of God is revealed from heaven against all ungodliness and unrighteousness of people who suppress the truth in unrighteousness, 19 because that which is known about God is evident within them; for God made it evident to them. 20 For since the creation of the world His invisible attributes, that is, His eternal power and divine nature, have been clearly perceived, being understood by what has been made, so that they are without excuse. 21 For even though they knew God, they did not honor Him as God or give thanks, but they became futile in their reasonings, and their senseless hearts were darkened. 22 Claiming to be wise, they became fools, 23 and they exchanged the glory of the incorruptible God for an image in the form of corruptible mankind, of birds, four-footed animals, and crawling creatures.
God’s wrath, His disdain for sin, is revealed against those who suppress the truth. The word suppress is key to understanding this passage and the remainder of Romans 1. This truth is evident to all people, Jew and Gentile, because every person has an internal programming that helps them know some semblance of right from wrong. But since the fall in Eden, people have set this truth aside. It has been suppressed. The result of this suppression is that people worshipped created things instead of the creator. Paul focuses on how this has manifested in pagan animal worship throughout the ages.