Recently, I spoke with the president of a very successful group regarding the appointment of various project leaders.
As names were mentioned, I silently noted the ones that were absent. A couple of possibilities would have sunk the projects on the date of their appointment solely on the basis of reputation. These people had burned bridges with several key players and generated wholly unnecessary animosity.
Had they been appointed, all would have been sweetness and light on the surface, but cooperation would have evaporated. The desire not to help an enemy would have trumped any desire to see the project succeed.
"Plays well with others" is a virtue that goes far beyond the playground and people can have very long memories of those who do not.