The same dynamic drives all kinds of economy and wars: it is cumulative causation, along the lines of "Those who have will receive more and they will have more than enough; but as for those who don't have, even the little they have will be taken away from them". Violence is rooted in the workings of both economies and war. The purpose of war is to compel others to do our will, and it is the outcome of many kinds of economic activity. War and economies are intimately related. The key to an alternative vision is the injunction, "Love your neighbour as yourself" However, while sermons are easy, there is no conclusive evidence that humanity has made moral progress over time. The struggle for a peaceable economy must be ceaseless, repeated again and again to counterbalance the inertia of cumulative causation. As William the Silent said, "One need not hope in order to undertake, nor succeed in order to persevere".