Is psychiatry a science?

There has always been controversy over what consitutes a psychiatric disorder and the best treatment options for a specific disorder. With the coming of DSM5, things seem to be getting even more complicated. When is depression a clinical disorder and when is feeling blue part of everyday life? Grieving after the loss of a loved one is considered normal and is not labelled depression, but what about melancholy after the loss of a job? I

In his excellent essay, Head Case, in the March 1, 2010 issue of The New Yorker, Louis Menand discusses the various issues associated with psychiatry and the influence of the pharmaceutical industry. Is psychiatry a science? The author explores both sides of the issue and provides a brief history of psychiatry and the influence of pharmacotherapy.