Original broadcast date: April 20, 2008

We are the safest and healthiest human beings who ever lived, and yet irrational fear is growing, with deadly consequences — such as the 1,595 Americans killed when they made the mistake of switching from planes to cars after September 11. In part, this irrationality is caused by those — politicians, activists, and the media — who promote fear for their own gain. Culture also matters. But a more fundamental cause is human psychology.

Working with risk science pioneer Paul Slovic, author Dan Gardner, author of his new book Risk: The Science and Politics of Fear, sets out to explain in a compulsively readable fashion just what that statement above means as to how we make decisions and run our lives. We learn that the brain has not one but two systems to analyze risk. One is primitive, unconscious, and intuitive. The other is conscious and rational. The two systems often agree, but occasionally they come to very different conclusions. When that happens, we can find ourselves worrying about what the statistics tell us is a trivial threat — terrorism, child abduction, cancer caused by chemical pollution — or shrugging off serious risks like obesity and smoking.

• Dan Gardner is a columnist and senior writer for the Ottawa Citizen, specializing in criminal justice and other investigative issues. Trained in history and law, Gardner worked as a senior policy adviser to the premier and the minister of education before turning to journalism in 1997. His writing has received numerous awards, including the National Newspaper Award, Amnesty International’s Media Award, and others.