Asher and Benjamin and others wrote in to remind me that toxic bosses are far worse than toxic employees. Because bosses are often able to define reality, at least for those in their sphere of influence, they can cause whole sections of an organization to go off the rails. More often than not, in organizations with significant marketing problems, we can point to one person who's responsible. And you can bet that person is a boss.
Great marketers often have the unusual combination of humility and confidence. Toxic ones have neither.