Career success depends more on an individual’s ability to get along with his or her supervisor, peers, and employees than it does on intellect or technical skill. Perhaps that is why some people seem to succeed with little more than a wink and a smile. Most of the time, these individuals are friendly, spontaneous, and fun loving. At their worst, however, they can be flighty, impulsive, or outright Machiavellian. How can you be sure your employees are using their powers of persuasion for good, not evil?