Is it possible to be optimistic about 'Pessimism'?

So many people seem to be so ‘down’ about our overall prospects of sorting ourselves out and getting our global act together. If you are one of these, how can you justify your position?
What is the point of your miserable, defeatist attitude?
What do you expect to achieve by your stance other than ‘Defeat’?
Don’t you think that a more ‘positive’ attitude might be of more benefit to your situation?
Do you really want to wallow in such a pessimistic approach to life?
Or do you want to push yourself to a more ‘positive’ and hopeful position?