According to social-psychological research, feelings of uncertainty in decision-making evoke two opposite responses: (i) reduction of uncertainty by information search, leading to less stereotyping of people, and hence less discrimination; (ii) social identification with an ingroup, inducing...

1. Introduction -- 2. The evidence on happiness -- 3. Relative income and happiness -- 4. Happiness and ethics -- 5. Happiness and good development -- 6. Happiness-oriented societal development under the premise of democracy -- 7. Orientation for a knowledgeable world.