ease which their fathers won after long effort and fatigue, and in maturer age; who, in short, started where the previous generation left off, and therefore wish to gain yet new enjoyments, different from and greater than those that they obtained without trouble through the efforts of the preceding generation. It is this little common drama, which we see re-enacted in every family and in which every one of us has been and will be an actor—to-day as a young radical who innovates customs, to-morrow as an old conservative, out-of-date and malcontent in the eyes of the young; a drama, petty and common, which no one longer regards, so frequent is it and so frivolous it seems, but which, instead, is one of the greatest motive forces in human history—in greater or less degree, under different forms, active in all times and operating everywhere. On account of it no generation can live quietly on the wealth gathered, with the ideas discovered by antecedent generations, but is constrained to create new ideas, to make new and greater wealth by all the means at its disposal—by war and conquest, by agriculture and industry, by religion and science. On account of it, families, classes, nations, that do not succeed in adding to their possessions, are destined to be impoverished, because, wants increasing, it is neces-
