If bigger objects go into a jar, then there will be space to fill it with smaller objects in sequence. If the order of the objects are reversed, then it ends in filling it at the starting point. Happiness in life is similar to this. Fill high priority needs in the life, and smaller needs can be...

Introduction -- The evidence on happiness -- Relative income and happiness -- Happiness and ethics -- Happiness and good development -- Happiness-oriented societal development under the premise of democracy -- Orientation for a knowledgeable world