"We will have to want Peace, want it enough to pay for it, before it becomes and accepted rule." With these words, Mrs. Roosevelt concludes her appeal for peace on earth, good will to men. During the past year, World Peace has seemed more difficult of achievement than ever before, despite the efforts of Leagues and Courts. This discouraging situation has inspired Mrs. Roosevelt, whose life is bound by special ties to the whole fabric of our country's welfare, to express her own sincere beliefs on the subject. She has analysed many peace plans and, as a result of her studies, presents her own suggestions as to how permanent peace can be brought about. This is a thoughtful book, written by a woman who realises that it is easier to keep out of situations which lead to war than it is to bring about peace once war is going on. If we can dispassionately go over the difficulties which arise between conflicting interests within our own borders, we will be in a better position to understand and arbitrate the quarrels which lead to war among other nations.