Jamieson, Fausset and Brown on Romans 1:24

24. Wherefore God also--in righteous retribution.

gave them up--This divine abandonment of men is here strikingly traced in three successive stages, at each of which the same word is used (Ro 1:24, 26; and Ro 1:28, where the word is rendered "gave over"). "As they deserted God, God in turn deserted them; not giving them divine (that is, supernatural) laws, and suffering them to corrupt those which were human; not sending them prophets, and allowing the philosophers to run into absurdities. He let them do what they pleased, even what was in the last degree vile, that those who had not honored God, might dishonor themselves" [Grotius].