The world is changing at an incredible rate. Most of these changes are taking place as the result of technological advances. We have survived Y2K. We are on the verge of a communications revolution. We have mapped the human genome in its entirety. In the fourth edition of Social Issues in Technology, Paul Alcorn continues his systematic theme and provides the most up-to-date information concerning issues previously discussed. Chapter 4, Economics and Cultural Impetus, and Chapter 10, Catastrophic Theory: The Plague of Technological Complexity, have both been expanded. A new report on the effects of modernization on traditional Maasai societies in Tanzania and Kenya has been added. Instructors who are using this book for a course should obtain the accompanying Instructor's Manual (ISBN: 0-13060258-2).Alcorn, Paul A. is the author of 'Social Issues in Technology A Format for Investigation', published 2002 under ISBN 9780130602572 and ISBN 0130602574.