New Insights Into Cause of Depression

Check out the below article:

http://www.sciencedaily.com/releases/2014/08/140827111946.htm

Recent research in mice indicates that serotonin levels might not play as significant a role in causing depression as was once assumed.  Granted, it's one study, and was conducted on mice, but calls to mind some important questions: 

1.  How much do we really know about the efficacy of psychotropics?  

2.  Do we have any true evidence that psychotropic drugs actually work?

My guess is we will see more studies related to answering these questions due to the growth in neuroscience research.