Churches which are doctrine-lite, or which define themselves with a ten or twelve point doctrinal statement, or which portray themselves as a nice, fun supplement to the more important things of life, are rather like the little pig who built his house of straw. When the wolf blows, the house will simply vanish in the wind. For Christians to continue to protest the world in the public square, they need first to be deeply and seriously grounded in the historic, doctrinal, and elaborate Christian faith. A faith built on Wikipedia articles or reducible to 140 characters points to no lasting city.