Produced by Curtis Weyant, Josephine Paolucci and the Online Distributed Proofreading Team at https://www.pgdp.net. (This file was produced from images generously made available by Case Western Reserve University Preservation Department Digital Library.) INTRODUCTION TO THE SCIENCE OF SOCIOLOGY THE UNIVERSITY OF CHICAGO PRESS CHICAGO, ILLINOIS THE BAKER & TAYLOR COMPANY NEW YORK THE CAMBRIDGE UNIVERSITY PRESS LONDON THE MARUZEN-KABUSHIKI-KAISHA TOKYO, OSAKA, KYOTO, FUKUOKA, SENDAI THE MISSION BOOK COMPANY SHANGHAI INTRODUCTION TO THE SCIENCE OF SOCIOLOGY _By_ ROBERT E. PARK AND ERNEST W. BURGESS THE UNIVERSITY OF CHICAGO PRESS CHICAGO, ILLINOIS COPYRIGHT 1921 BY THE UNIVERSITY OF CHICAGO All rights Reserved Published September 1921 Transcriber's Note: Minor typos have been corrected. Footnotes have been moved to the end of the chapters. Italicized letters, such as (_a_), have been changed to unitalicized (a) for easier reading. PREFACE The materials upon which this book is based have been collected from a wide range of sources and represent the observation and reflection of men who have seen life from very different points of view. This was necessary in order to bring into the perspective of a single volume the whole wide range of social organization and human life which is the subject-matter of a science of society. At the same time an effort has been made to bring this material within the limits of a very definite series of sociological conceptions which suggest, at any rate, where they do not clearly exhibit, the fundamental relations of the parts to one another and to the concepts and contents of the volume as a whole.