AIDS, Lyme disease, and the deadly hantavirus are just a few of the dozens of new diseases to arrive in recent years. Old ones such as TB and cholera have returned with sharper virulence. Where do new diseases come from? Why are old ones back as vicious changelings? Why now? We created this epidemic of epidemics by transforming our environment and behavior - our landscape, technology, and sex lives. Thus we hasten microbes' evolution and our own, making the world a global village for diseases. In 'Man and Microbes', respected science writer Arno Karlen presents a dramatic panorama of the natural history of disease. Drawing on case studies and tales of medical detection, he uncovers the ills of ancient hunter-gatherers, relates the rise of diseases that came with each domesticated species, and exposes the origins of modern urban epidemics.