By "definition of America" I mean neither epigrams nor statistics; we are defined by everything which separates and distinguishes us from others. We are, for instance, the only country lying between the Atlantic and Pacific Oceans, and 25° 35' and 49° north latitude. This definition is exact and complete; it is neither a boast nor a criticism; it establishes no superiority or inferiority; it is a fact, the consequences of which are tremendously significant (our varied climate, our resources, our bigness with _its_ consequences in the temper of the people, all go back to this mathematical _fact_.) Not all the distinguishing marks of our country can be expressed in mathematical terms; if they could be, we would avoid the danger of jingo pride, the logical error of making every difference into a superiority. Moreover, if we had mathematics, we should be able to put on one side what we have in common with other countries, on the other what is exclusively ours--and make a comparison, a guide to international conduct "on scientific principles". We would know how far our likeness joined us to others, so that we could lay a firm basis for action; and how far our differences required compromises or made compromise impossible. We lack mathematics; our physical boundaries are fixed, but our social boundaries are fluid, our national "genius" escapes definition. Yet we can describe these imponderables even if we cannot force them into a diagram, and their vital significance is as great as any statistics can be. It is a fact that millions of people came to America in the hope of a better life--the number who came can be written down, the intensity of hope can be guessed; and only a compassionate imagination can say what this country gained by the hopes fulfilled or lost by those which ended in despair. Yet the elation and the disillusion of men and women are both reflected in our laws and customs; and so far as they did not occur in other lands, they are factors in defining the great complex of our national character. We are defined by events--immigration was an event. But immigrants came to other countries as well, to Canada and Brazil and England. When they came and in what numbers becomes the defining mark for us. It is self-evident that we are different from all other nations both absolutely and relatively; no other nation lies within our boundaries or has all our habits, because none has had our history--that is the base of absolute difference; all other nations share something with us, but we differ from each relatively--in some degree. This would not be worth mentioning if chauvinism did not insist that we differed (and were superior) in all things, while a base cosmopolitanism insisted that we were alike in all things and should be made more so. The corrective for each of these errors is to see what we are. _The Revolution in Property_