Check out this quote from the book Another City.
“Through its practices of hospitality, forbearance, forgiveness, and reconciliation, it participated in the messianic suffering of God that communicated to the world the idiom or logos of its beginning and end in peace. Contrary to the caricatures that prevail in much of contemporary theology, the communal form of life fostered by the early church as altera civitas (another city) did not seek to withdraw from the world, but encountered head-on its most pervasive (i.w., violent) tendencies.”
So many in Christian circles today hold to the castle/fortress mentality–wanting to stay safe and pure on the inside, without getting too involved with the outside. But time and time again we see that the early church was one that was exemplified by standing up and against to the ills and vices of society–whether they be political in nature or not.