The more we understand about how things work, the more we can work with them. I suppose they will develop new treatments for the 31 million depressed folks out there...let"s hope so. Something has got to give, a person is just not at their best when they are stuck in fear, anger, resentment or anxiety...plus I think behaviors are easily learned and imitated, so that all the children born to millions of depressed persons are likely to have symptoms develop over time, even if they are not genetically prone to depressive states. We all know at this point it is both Nature AND Nurture that effects/affects a persons attitudes and behaviors throughout a lifetime.
The brain is so interesting!