Great leaders are a rarity. Malcolm Gladwell, Canadian author and journalist at New Yorker talks about Emil Freireich, one of the heroes of the twentieth century. Emil Freireich is a hematologist and, in addition to being a hero for the many lives he saved, is also considered a great genius. In the fifties he was head of the department of hematology of the US National Cancer Institute. Without past experiences and risking a lot he managed to cure dozens of children suffering from childhood leukemia. At the time, the mortality rate for this disease was 100%, today is about 3%. This impressive result was possible thanks to his intuition. Malcolm Gladwell speaks about what this intuition was and, starting from this example, he explains why a real leader is always an independent person.