Money does not buy happiness, it is said, and apparently it does not factor much into optimism either. 20 percent of humanity hoards 83 percent of the world's wealth but the vast majority of people, including the 60 percent of the world possessing just 6 percent of world wealth, think the next 5 years will be better for them.Yes, despite an economic recession, famine, thousands of years without a single day bereft of war somewhere in the world and media reports about a flu epidemic afflicting the Earth, a new study from the University of Kansas and Gallup indicates that humans are optimistic. Apparently it is just our nature.