Could great men thunder As Jove himself does, Jove would ne'er be quiet. For every pelting, petty officer Would use his heaven for thunder; Nothing but thunder! ... Man, proud man, Drest in a little brief authority, Most ignorant of what he's most assured, His glassy essence, like an angry ape, Plays such fantastic tricks before high heaven As make the angels weep; who, with our spleens, Would all themselves laugh mortal. --SHAKESPEARE. 14. "THE SICKNESS OF AN ACQUISITIVE SOCIETY" It is so difficult a task to form any correct estimate of one's own surroundings, largely on account of our very familiarity with them, that historical students have generally evaded this responsibility. They have often declared that it was impossible to do so satisfactorily. And yet no one will ever know more than we about what is going on now. Some secrets may be revealed to coming generations, but plenty of our circumstances will be obscure to them. And it certainly seems pusillanimous, if not hazardous, to depute to those yet unborn the task of comprehending the conditions under which we must live and strive. I have long believed that the only unmistakable contribution that the historical student can make to the progress of intelligence is to study the past with an eye constantly on the present. For history not only furnishes us with the key to the present by showing how our situation came about, but at the same time supplies a basis of comparison and a point of vantage by virtue of which the salient contrasts between our days and those of old can be detected. Without history the essential differences are sure to escape us. Our generation, like all preceding generations of mankind, inevitably takes what it finds largely for granted, and the great mass of men who argue about existing conditions assume a fundamental likeness to past conditions as the basis of their conclusions in regard to the present and the still unrolled future. Such a procedure becomes more and more dangerous, for although a continuity persists, there are more numerous, deeper and wider reaching contrasts between the world of to-day and that of a hundred, or even fifty, years ago, than have developed in any corresponding lapse of time since the beginning of civilization. This is not the place even to sketch the novelties in our knowledge and circumstances, our problems and possibilities. No more can be done here than to illustrate in a single field of human interest the need of an unprecedentedly open mind in order to avail ourselves of existing resources in grasping and manipulating the problems forced upon us.