  Nowhere was Stoic cosmopolitanism itself more influential than in early Christianity. Early Christians took the later Stoic recognition of two cities as independent sources of obligation and added a twist. For the Stoics, the citizens of the polis and the citizens of the cosmopolis do the same work: both aim to improve the lives of the citizens. The Christians respond to a different call: “Render therefore unto Caesar the things which are Caesar’s; and unto God the things that are God’s” (Matthew 22:21). On this view, the local city may have divine authority (John 19:11; cf. Romans 13:1,4,7), but the most important work for human goodness is removed from traditional politics, set aside in a sphere in which people of all nations can become “fellow-citizens with the saints” (Ephesians 2:20).