The rapidly growing appreciation of the importance of race during the last few years, the study of the influence of race on nationality as shown by the after-war disputes over boundaries, the increasing complexity of our own problems between the whites and blacks, between the Americans and Japs, and between the native Americans and the hyphenated aliens in our midst upon whom we have carelessly urged citizenship, and, above all, the recognition that the leaders of labor and their more zealous followers are almost all foreigners, have served to arouse Americans to a realization of the menace of the impending Migration of Peoples through unrestrained freedom of entry here. - Summary from the author's statement Note: Prospective listeners should be aware that this book contains racial prejudice.