For the first time in a thousand years, Americans are experiencing a reversal in lifespan. Despite living in one of the safest and most secure eras in human history, one in five adults suffers from anxiety as does one-third of adolescents. Nearly half of the US population is overweight or obese and one-third of Americans suffer from chronic pain   the highest level in the world. In the United States, fatalities due to prescription pain medications now surpass those of heroin and cocaine combined, and each year 10% of all students on American college campuses contemplate suicide. With the proliferation of social media and the algorithms for social sharing that prey upon our emotional brains, inaccurate or misleading health articles and videos now move faster through social media networks than do reputable ones. This book is about modern health   or lack of it.