Brian Edgar in his new book, God is Friendship proposes adding friendship to the typology of how Christians engage society and the world. Quite refreshing to see a theologian take Christian friendship seriously enough to propose such a model.
He identifies 10 models in a typology of how Christians should relate to the world. 1) Aliens in a Foreign Land (New Testament era), 2) Rulers in Christendom (Constantine), 3) Residents of Two Cities (Augustine), 4) Reformers of the World (Reformation, John Calvin), 5) Models of Alternative Life, (Anabaptists, Neo-Anabpatists, post-liberals), 6) Workers in All Spheres (Kuyper), 7) Agents of Change Working from Above (Modern Roman Catholicism), 8) Agents of Change Working from within Society (more of an immanentist view of God in the world), 9) Priests of a Christian Culture (society which is Christian based), and 10) Citizens of a Pluralist Culture.
To these ten, Edgar proposes one more: friends of God in life, church and culture!