Romans 1:18-32 may be drawing on Proverbs 1:20–33. I take wisdom to be creational norms and her crying in the streets to refer to her accessibility. That is, her calling in the market squares is general revelation. Romans 1 is also concerned with the rejection of general revelation. The statement in Romans 1:26 about acting contrary to nature also fits with understanding wisdom as creational norms. In addition, Romans 1:21 speaks of not honoring/glorifying God, which seems equivalent to not fearing him. Romans 1:22 also speaks of the wise and fools, key terms in Proverbs. The links to Proverbs may be broader than just Proverbs 1. Romans 1:28 says these people did not acknowledge God, which may allude to Proverbs 3:6.