I think it is not the disease of our time. It is just what most of the people think even though they are not really suffering from depression. My psychology teacher told us that our mind is so powerful that it whatever your mind believed, your body will achieve. This means that people in this time often misdiagnosed theirselves on the symptoms of this disease. It is not really recommended to just look and diagnosed yourself among symtoms, it is still best to go to a practitioner as if your mind set those symptoms it might really lead to what the symptom is.