different, even confliction

This book is an attempt to introduce the reader to the United States. It intends to give a concise but fairly well rounded overview of present day American society; not only a picture of surface phenomena, but insights into American culture and insights about the American people.
    Various aspects of American life are presented through articles written mainly by Americans themselves, or by westerners familiar with the United States. Most were written by scholars or specialists on the topic of the field. A number of articles were written by sociologists. This gives a perspective that goes beyond the common articles written for the average tourist, for the person with passing curiosity, or for the ordinary man-in-the-street. A number of articles were also selected with the idea of presenting different, sometimes conflicting, points of view about the same topic. This, it is hoped, will help the reader to gain better understanding and to help him draw his own conclusions.
    It should be stressed that the viewpoints of the various authors are not necessarily those of the compilers of this book. We may agree with all of some articles, only partially with others and possibly disagree considerably with a few of the selections. To allow the reader to use his own judgement, we have generally kept the articles in their original form. If changes were made they were to make the language easier or to make the articles more manageable for the reader.
    Most of the articles in this book were selected on the basis of the following criteria:
    1. Their suitability for giving accurate information about a topic or some aspect of the topic. These articles should help present a well-rounded picture of the whole. In this respect, we have sometimes given preference to an earlier article rather than a later one if the former gives a more insightful or more comprehensive treatment of the subject.
    2. Their appeal to the ordinary reader. These articles should be authoritative and reliable, yet not too elementary. The contents should be of interest to most readers.
    3. Their linguistic quality and degree of difficulty. The level for which these articles are intended is college students of English, other college students with a fairly good command of English, and the general reader interested in the U. S. and with fairly good comprehension of the language.
    4. Their general relevance to Chinese readers or Chinese society. These articles should have some general significance to China, either present or future, and not be totally irrelevant.
    Obviously no one book can give a completely comprehensive picture of description of such a vast and complex nation. Many readers may disagree with our choice of topics; most likely a number will say we have left out important ones. Many may feel we did not use our best judgment in selecting the articles. We must admit that we did not always agree among ourselves. We were further restricted by the limited amount of materials to choose from. Needless to say, we welcome suggestions and criticisms from our readers. And in spite of all its shortcomings, if the book has helped the reader to gain some insight and understanding about the United States and its people and has stimulated the reader to go further, and to study more, then in a modest way this book will have accomplished much of what if was intended to do.