There are many criteria to examine people’s intelligence, but for some people the best measure is success. I think it is true, but only up to a point. Most people believe that an intelligent person is more successful than ordinary people. They consider that clever human beings achieve their goals sooner than normal ones. In general view, wise people are richer than ordinary people they know how to make decisions at critical situations. Based on research at school in Italy, smart students with high intelligence scores have better contribution to development of their societies when they grow up. As a result, intelligence is a key to success.