Christians do want to be useful in their Babylonian captivity. They follow the counsel of the prophet Jeremiah who urged the children of Israel to seek the peace of the city of their exile, for in its peace is also their peace. The great danger, then and now, is that, in being useful to the city of their exile, they forget the New Jerusalem, the city of their destination. It really is not terribly gratifying to be a “religious vote” eagerly sought by the partisan factions of Babylon when we remember that [Jesus] called us to be the salt of the earth and the light of the world.
Somewhat less helpful is his discussion of culture, which is missing a rather crucial component: the human element of shaping responsibly the world of which we are part. Neuhaus would do well to read H. Henry Meeter, The Basic Ideas of Calvinism, especially chapter 7: "Human Culture."