[writeinpencil]

I don't agree. There is a good line in the book "Impro" about good and bad teachers. It says that we think of "good teachers" as providing a lot of some substance called "education" while "bad teachers" provide only a little. In fact bad teachers can and often do not only fail to provide education but actively make students less educated by, for instance, teaching wrong ideas, punishing arbitrarily, etc etc. The same is true of managers. They can easily drop below zero and start to have a negative impact on productivity and their employees.

[cdolan23]

This is very true. I've seen a single bad manager destroy an entire wing of an engineering organization in a couple of months. This person wasn't even a particularly mean or bad person, and had apparently been a successful middle manager for Pac Bell in their previous role. But they had no feel for the team they had taken over at all, and tried to impose a new structure all at once (basically boiled down to all of the senior devs were now technical project managers and wouldn't be coding). Everyone left within a couple of weeks.