This book is a must read now ,than ever. I first read this book as a Undergrad, in college.The impact of disease on society is the major theme.The ecological relationships we have with our environment can cause stresses to organisms?These new niches we create have caused the emerging of new virulent viruses.Plagues and Peoples explores these societal, and psychological effects of disease on the human race over the entire human history, from prehistory to the present.