We should always remember that the conditions of today are more suitable to a wise decision than the conditions of 1815. We have, for one thing, the advantage of the experience of the past hundred years. There is no doubt in our minds as to how the old plan has worked and how it may be expected to work if again followed. It led to the Concert of Europe and the Balance of Power, both of which served in certain emergencies, but failed in the hour of supreme need. Indeed, it is probable that they promoted the crash that at last arrived. Another advantage is that we have today in the world a vastly greater amount of democracy than in 1815. The people who pay the bills of Mars today can say what shall be done about keeping Mars in chains; and that is something they could not do in 1815. It is for them to know all his capers, and his clever ways of getting out of prison, and to look under his shining armor to see the grizzly hairs that cover his capacious ribs; and having done this to decide what will be their attitude toward him. It is not the business of an author to offer his views to his reader ready made. Enough if he offers the material facts out of which the reader may form his own opinions. That is my object in this book. I do not disguise my conviction that some of the fruits of the war that ended at Waterloo were lost through the inexperience of the men who set the world on its course again. Whether or not the men were as wise as they should have been is now a profitless inquiry. My only object is to set before the reader as clearly as I can the idea of a permanent peace through federated action, to show how that idea came up in connection with the war against Napoleon, how it was rejected for a concerted and balanced international system, what came of the decision in the century that followed, and finally in what way the failure of the old system is responsible for the present war. If the reader will follow me through these considerations, he will be prepared to examine in a judicial spirit the arguments for and against President Wilson’s suggested union of nations to end war.