Today on Focus, we'll talk to a challenger of the conventional knowledge that our genes and environments are the causes of most serious illnesses, including cancer and heart disease. Paul Ewald believes that these problems, among others—ulcers, miscarriages, schizophrenia, Alzheimer's—all come from infectious origins. He'll talk about what led him to this conclusion and his book Plague Time today on the show.
How much of human behavior is genetically determined? We'll revisit this age-old question this morning on Focus as we talk with authors Terry Burnham and Jay Phelan. They claim that humans are well adapted to the environment in which they originated, but since we no longer live as hunter-gatherers, our basic instincts can lead to harmful behaviors. They also argue that knowing this can help us control our behavior and lead us to happier lives.