hat American interest in the problems here discussed is hardly less vital than that of Europe I am even more persuaded than when the first American edition of this book was issued in 1910. It is certain that opinion in America will not be equipped for dealing with her own problems arising out of her relations with the Spanish American states, with Japan, with the Philippines, unless it has some fair understanding of the principles with which this book deals. Its general interest even goes farther than this: no great community like that of modern America can remain indifferent to the drift of general opinion throughout the world on matters wrapped up with issues so important as those of war and peace.