genius thus found a favourable field of action. [Sidenote: _Value of Diplomacy._] It is not necessary to turn far back into the past in order to understand what can be achieved by negotiation. We see daily around us its definite effects in sudden revolutions favourable to this great design of state or that, in the use of sedition in fermenting the hatreds between nations, in causing jealous rivals to arm against one another so that the _tertius gaudens_ may profit, in the formation of leagues and other treaties of various kinds between monarchs whose interests might otherwise clash, in the dissolution by crafty means of the closest unions between states: in a word, one may say that the art of negotiation, according as its conduct is good or evil, gives form to great affairs and may turn a host of lesser events into a useful influence upon the course of the greater. Indeed, we can see in diplomacy thus conducted a greater influence in many ways upon the conduct and fortunes of mankind than even in the laws which they themselves have designed, for the reason that, however scrupulous private man may be in obedience to the law, misunderstandings and conflicts of ambition easily arise between nations, and cannot be settled by a process of law but only by a convention between the contending parties. It is on the occasion of such conventions that diplomacy plays a decisive part. It is thus easy to conclude that a small number of well-chosen negotiators posted in the different states in Europe may render to their sovereign and their state the greatest services; that a single word or act may do more than the invasion of whole armies because the crafty negotiator will know how to set in motion various forces native to the country in which he is negotiating, and thus may spare his master the vast expense of a campaign. Nothing can be more useful than a timely diversion thus set on foot. It is also of high interest to all great princes that their negotiators should be of such character and standing as to act appropriately as mediators in the disputes between other sovereigns and to produce peace by the authority of their intervention. Nothing can contribute more to the reputation, the power, and the universal respect of a monarch, than to be served by those who themselves inspire respect and confidence. A powerful prince who maintains a constant system of diplomacy served by wise and instructed negotiators in the different states of Europe, and who thus cultivates well-chosen friendships and maintains useful sources of information, is in a position to influence the destiny of neighbouring foreign states, to maintain peace between all states, or to pursue war where it is favourable to his design. In all these concerns the prosperity of his plans and the greatness of his name depend first and last on the conduct and qualities of the negotiators to whom he entrusts his services. So now we examine in detail the qualities necessary for a good negotiator.