It's an accommodation of each other's interests.
The good negotiator is the one who listens to the other person's position and manages to accommodate as much of it as he or she possibly can, rather than the one who folds their arms and says all he knows is that this is his position. So if people put themselves in the other's shoes....
I went through exercises where all the conservationists had to make the economic development proposals and all the economic development interests had to make all the conservation proposals.