"Indeed, equal amounts of research support both assertions: that mentorship works and that it doesn't. Mentoring programs break down in the workplace so often that scholarly research contradicts itself about the value of mentoring at all, and prompts Harvard Business Review articles with titles such as "Why Mentoring Doesn't Work." The mentorship slip is illustrated well by family businesses: 70 percent of them fail when passed to the second generation. A business-owner parent is in a perfect spot to mentor his or her child to run a company. And yet, sometime between mentorship and the business handoff, something critical doesn't stick. One of the most tantalizing ideas about training with a master is that the master can help her protege skip several steps up the ladder. Sometimes this ends up producing Aristotle. But sometimes it produces Icarus, to whom his father and master craftsman Daedalus of Greek mythology gave wings; Icarus then flew too high too fast and died. Jimmy Fallon's mentor, one of the best-connected managers Jimmy could have for his SNL dream, served him up on a platter to SNL auditions in a fraction of the expected time it should take a new comedian to get there. But Jimmy didn't cut it--yet. There was still one more ingredient, the one that makes the difference between rapid-rising proteges who soar and those who melt their wings and crash. III." --