"The facts come sometimes to belie those who are convinced of the present reality of ‘moral progress’, according to the most usual conception of it; but all they do is modify their ideas a little in this respect, or refer the realization of their ideal to a more or less remote future, and they, too, might crawl out of their difficulties by talking about a ‘rhythm of progress’. Besides this, by a much simpler solution, they usually strive to forget the lesson of experience: such are the incorrigible dreamers who, at each new war do not fail to prophesy that it will be the last."