Depressive disorders are among the most common consequences of sexual harassment and similar workplace mistreatment. Profoundly different from the “blues” we all encounter in everyday life, Major Depressive Disorder is a life-threatening illness that affects not only the individual but her or his entire family. Because all lives have stressors and depression is such a common condition, it is critical that an expert be able to disentangle proximate cause from pre-existing conditions and concurrent stressors and make a credible argument for their opinion. Separately and together, FCA experts have been handling complex issues of causation for over 30 years.