Fin-de-si cle is a name covering both what is characteristic of many modern phenomena, and also the underlying mood which in them finds expression. Experience has long shown that an idea usually derives its designation from the language of the nation which first formed it. This, indeed, is a law of constant application when historians of manners and customs inquire into language, for the purpose of obtaining some notion, through the origins of some verbal root, respecting the home of the earliest inventions and the line of evolution in different human races. Fin-de-si cle is French, for it was in France that the mental state so entitled was first consciously realized. The word has flown from one hemisphere to the other, and found its way into all civilized languages.