Is Depression a reasonable reaction to a dysfunctional society?

The more I encounter those suffering depression (and occasionally when I feel low myself) – the more this question is on my mind.

In a world where many of us are working to live, plagued by doubts and insecurities, divorced from a clear sense of identity in a planet which increasingly threatened, more of us are becoming depressed.

And I wonder whether depression is not so much an illness as an appropriate reaction when faced with the world we live in.