Conflict within a team is not always a bad thing. Happy teams are not necessarily the most productive. “If we're going to draw an arrow of causality, it's stronger to reword the statement as ‘a productive team is a happy team’,” says Leslie DeChurch, a psychologist at Northwestern University. “Nothing builds cohesion in a team like excellence.”

Avoiding conflict can discourage the creative friction that can generate new or better ideas. Conflict associated with tasks is different from that associated with personalities. Conflict over ideas can be helpful. But when conflicts get personal, things can get ugly.