There are a lot of evidences to it. During the last decades an income of an average American has risen two times in comparison to the 50s of XX century, at the same time contemporary families have twice as few kids. Nevertheless the results of polls display: people are satisfied with their lives less than they were half a century ago. At that time 35% of the participants called themselves very happy, and in the middle of the 90s only 29% did. The same tendency can be traced everywhere – from Europe to Australia. Moreover, there was a research conducted in the US where they compared the attitude of 42 rich people (whose yearly income was more than $10 millions) and average people who were selected accidentally. It turned out that multi-millionaires are not more satisfied with themselves and their lives. Money certainly makes everyday life easier, but at the same time personal problems appear that cannot be solved with the help of money: rich people had more complaints about such problems than the people with an average income… The conclusion is very simple. It is difficult to be happy if you are penniless. But you will be disappointed if you hope to become happy with the help of money. A person needs money like air. But he needs only a certain, not so great amount of air for a full life. If we have much more air than we need, life does not get either easier or more pleasant because of it.