The United States have made to civilization a fourth contribution of a very hopeful sort, to which public attention needs to be directed, lest temporary evils connected therewith should prevent the continuation of this beneficent action. The United States have furnished a demonstration that people belonging to a great variety of races or nations are, under favorable circumstances, fit for political freedom. It is the fashion to attribute to the enormous immigration of the last fifty years some of the failures of the American political system, and particularly the American failure in municipal government, and the introduction in a few States of the rule of the irresponsible party foremen known as "bosses." Impatient of these evils, and hastily accepting this improbable explanation of them, some people wish to depart from the American policy of welcoming immigrants. In two respects the absorption of large numbers of immigrants from many nations into the American commonwealth has been of great service to mankind. In the first place, it has demonstrated that people who at home have been subject to every sort of aristocratic or despotic or military oppression become within less than a generation serviceable citizens of a republic; and, in the second place, the United States have thus educated to freedom many millions of men. Furthermore, the comparatively high degree of happiness and prosperity enjoyed by the people of the United States has been brought home to multitudes in Europe by friends and relatives who have emigrated to this country, and has commended free institutions to them in the best possible way. This is a legitimate propaganda vastly more effective than any annexation or conquest of unwilling people, or of people unprepared for liberty.