It seems that optimism has been central to the process of evolution. It has greatly influenced the way humans think, work, play and respond to fundamental issues such as birth and death. It is a force that has been used as a lever in the hand of politicians and a weapon in the hands of dictators. Both groups use optimism as a way of controlling people and harnessing them to a cause. If indeed, Tiger's belief that optimism is a biological phenomenon rooted in the genes is true, then it gives us another technique to use in people management processes.
Optimism appears to be socially desirable in all communities.
Purveyors of optimism are generally accepted whereas those who spread doom and gloom, panic and hysteria, are treated with contempt. Many of the world's religions are adherents to the doctrine of optimism. The sufferings of this world, the vicissitudes of life, the pain of disease and death are all mitigated by the expectancy of some future favourable outcome, maybe not in this world but certainly in some other. Religions allow communities to organise their fears and their futures by establishing a set of rules and beliefs for everyone to follow. In this way earthly fears are relegated to the arena of trivia and society becomes more manageable.