Depression is one of the most common mental health disorders, affecting 14% of all people at some point in their lifetime. Women are twice as likely to become depressed as men, but beyond gender there are a variety of risk factors that influence the prevalence and likelihood of experiencing depression. Here it consolidates research findings on risk factors into one source, for ease of reference for both researchers and clinicians in practice. The book divides risk factors into biological, cognitive, and social risk factors. This provides researchers with the opportunity to examine the interface among different theoretical perspectives and variables, and to look for the opportunity for more complex and explanatory models of depression.