about happiness

Yesterday I saw a TV show about happiness.
In different countries the level of happiness is diverse.
The most happy people live in Denmark.
There are special conditions for people to make them happy.
The most powerful factor is that all people are equal.
Differences between people, some are rich another poor, exasperate the people.
The more irritation the less happiness.
May be this theory is right, but what about the India then, for example, there are a lot of happy people in spite of that they are living among rich and poor. May the reason is in differences between the cultures of India and Europe.
In spite of what happens in the country the happiness is in man's attitude to the world.
It's very difficult for me to see that my parents are less happy in their lives.
May be the main reason is age. Only for young people is nature to see their future in pink colours, only because everything is in future.
Then children should be the most happy even when adults cut down them nearly in everything.
One thing I know undoubtedly, if yo want to be happy, Be happy!