From this podcast we learn:  (1) individuals or groups may not, cannot, demean people they know personally; (2) a bad action by the other side might be just a mistake; (3)  parties must accept inability to get everything they want; (4) corporations can accomodate and accept environmental goals over long periods, but not in the next few months.  

To prove these points, mediator Bill Beranek cites real example from Indiana.