Biggest cause in the rise of depression is I think due to modern society. Years ago people were, not as some would say more content but blissfully ignorant, for as they say ignorance is bliss. The pressure is on now to be successful for we have been told with success comes happiness and as well as that not being the case when people fail at whatever chosen path now for whatever reason, then they consider themselves a failure and there can start the downward spiral.
We are fed depression 24/7, when was the last time you read a good heart warming feel good story?, it's constant fecking d