Did you know you’re likely to have had over 89,000 heated altercations with your closest relations before you reached the age of eight? By age 16, thousands more hours will have been spent by most of us in some form of disagreement with those in our extended social networks. As a species, we’re well practised at falling out with each other. We may even have a gene for it – certainly, some of us seem to be gifted. When it comes to finding resolutions, however, things don’t come quite...