Smile, Smile, Smile

The centennial commemoration of the start of the First World War has brought to the fore some of the music of that war, including an unsung gem that could well be the greatest fight song of all time. (Granted, it’s not exactly unsung, since it’s a song. And the BBC recently praised it for its musical qualities. But the song, “Pack Up Your Troubles,” has yet to be appreciated for its matchless galvanizing effect as pure language. And not really matchless, either, since it calls for a match.)

Here...