The greatest managers in the world seem to have little in common. They differ in sex, age, and race. They employ vastly different styles and focus on different goals. Yet despite their differences, great managers share one common trait: They do not hesitate to break virtually every rule held sacred by conventional wisdom. They do not believe that, with enough training, a person can achieve anything he sets his mind to. They do not try to help people overcome their weaknesses. They consistently disregard the golden rule. And, yes, they even play favorites. First, Break All the Rules explains why.