The Riddle of Consciousness

For most of human history, people have assumed that some kind of vitalistic essence had to be added to matter to produce life. The belief in an immaterial soul was pervasive. At one point, scientists even tried to weigh the soul by weighing a body right before and after death, expecting to find a decrease

The Meaning of Secondary Prevention

A November letter to the editor in American Family Physician chastises that publication for misusing the term “secondary prevention,” even using it in the title of an article that was actually about tertiary prevention. I am guilty of the same sin. I had been influenced by simplistic explanations that distinguished only two kinds of prevention: