Joseph Grenny, writing for HBR:
These are only a few of a much longer list of group productivity killers. Regardless of what’s happening in your specific meeting, the principal cause of most conflicts is a struggle for validation. This means that most conflict is not intractable because the root cause is not irreconcilable differences, but a basic unmet need.
There’s some useful suggestions here about how to deal with conflict in meetings. It’s nothing ground breaking, but a good reminder that the solution is often simply to offer a process that allows all people to be heard.