Let us take these points up in their order.
As a preliminary, let me say that the Treaties of Peace in this connection cannot include the Treaty of Lausanne with Turkey. Certainly at the time that that Treaty was negotiated there was no imposed peace on Turkey; as a matter of fact the Turkish negotiators had things pretty much their own way with the Allies. So that we are considering merely the Treaties with Germany, Austria, Hungary and Bulgaria.
In the first place, the question in many cases as to whether or not there is any such thing as a "just" frontier is at least a very doubtful one. I put it this way. If you have a situation where reasonable, impartial and informed minds can differ, you do not have a situation where it can be arbitrarily said by any one that any one frontier is the just frontier. Of course I am not talking of the type of mind which insists that the particular line that he would draw is the one and only line, despite the views of anybody else, because to admit such a theory would mean the admission of the existence of perhaps fifty different frontiers between the same two countries at the same time.
Now as to the Peace Treaties, we certainly have that situation to a very large extent. I do not see how any one could contend that the existence of the Polish corridor is a perfect solution, nor do I see how any one could contend that the absence of the Polish corridor would be a perfect solution. One of the Polish Delegation said to me in Paris in December, 1918, in substance, that it would be impossible to draw a frontier between Germany and Poland which would not do an injustice to one country or to the other or to both, and I believe that his observation is perfectly sound.
The same thing is true as between Roumania and Hungary, and perhaps more true.
My sympathies as to Vilna are rather with the Lithuanians than with the Poles, but no one can read the documents without seeing that the Poles have a case.
My own view has always been that the frontier between Poland and Russia is too far to the East, but none the less the Russians, after a fashion, agreed to it.
Most of those whose opinions I respect believe that it was wrong to give the Austrian Tyrol to Italy. Despite those views, I have always believed that the decision was defensible.
Different American experts of the highest qualifications, of the utmost sincerity and of complete impartiality took different views as to Fiume and the Italian-Yugo-Slav frontier generally. In such circumstances, who could say, what tribunal could decide, the "just" frontier?