Often in our society, the pessimists are frowned upon, but historically we needed the pessimists to survive. Let's say after a few lean years we had a fantastic harvest in our village. Yay! Now, all the optimists want to have a huge feast, eat everything and be happy. Our harvest is proof that we can do this. We're all good. She'll be right. Meanwhile, the pessimists are walking around the village with their long faces, painting dark pictures, talking about hard days and g