Can post-traumatic stress disorder be prevented?

In the 20-odd years since the cluster of symptoms known as Post Traumatic Stress Disorder (PTSD) has been studied, we have learned a great deal about treating the distress that accompanies trauma in its many forms. We will only know whether or not we have succeeded in preventing the disorder when we have access to long-term studies of people who received intervention immediately following a traumatic event. We do know, however, much more about...