The most damaging leaders I've come across in the workplace are those who don't know how to value the people who work for them. They may be egomaniacs or control freaks that suck the life out of their employees, giving little back in positive reinforcement. Some people continue to work for destructive managers because they need their job or are too demoralized to leave and find something better. Still others believe that this is the way leaders should behave-as know-it-all, empire builders-with little concern for the people who fall by the wayside. The people who don't thrive under this kind of leadership may, in fact, be viewed as poor leadership material themselves, not tough enough for the game.