Romans 13:1–7 has been the most important text in scripture for Christian reflection on political authority, yet what it does not say has left Christian social ethicists and political/legal theorists with many lingering questions, especially about the proper response to unjust magistrates. To what resources should Christian thinkers look to illumine the gaps left by the Pauline silence, and just how absolute or relative did Paul intend his remarks in Romans 13:1–7 to be? This article presents a twofold thesis in response to this twofold question. First, it argues that the Noahic covenant, Genesis 8:21–9:17, is an important, although overlooked, background resource for interpreting Romans 13:1–7. Second, this article illustrates the practical benefit of reading Romans 13 in light of the Noahic covenant by offering a new argument for why Christians should not interpret Paul's unqualified command to submit to civil authorities as absolutely forbidding resistance to unjust magistrates. Paul's words about magistrates in Romans 13 have not superseded the obligation to pursue justice that God gave to the human community as a whole in the Noahic covenant. Thus the primal obligation resting in the people implicitly qualifies Paul's instructions.