The "Kingdom of God" is crucial to Rauschenbusch's proposed theology of the social gospel. He states that the ideology and doctrine of "the Kingdom of God," of which Jesus Christ reportedly "always spoke" has been gradually replaced by that of the Church. This was done at first by the early church out of what appeared to be necessity, but Rauschenbusch calls Christians to return to the doctrine of "the Kingdom of God." Of course, such a replacement has cost theology and Christians at large a great deal: the way we view Jesus and the synoptic gospels, the ethical principles of Jesus, and worship rituals have all been affected by this replacement. In promoting a return to the doctrine of the "Kingdom of God", he clarified that the "Kingdom of God": is not subject to the pitfalls of the Church; it can test and correct the Church; is a prophetic, future-focused ideology and a revolutionary, social and political force that understands all creation to be sacred; and it can help save the problematic, sinful social order.