These judgments are almost always highly insulting as well as inaccurate, and engender the hostilities so frequently featured in major problem equilibria. Where large numbers of people are involved, and especially in hierarchical and complex situations, there tends to develop a very great difference between what benefits the common good and what will benefit one's own narrowly selfish interests. You can reduce to some extent that difference and that punishment, but you cannot entirely eliminate it. If you are very persuasive to the point where people on the other side of an issue from you go against their own interests, you soon run out of friends and potential friends. Reduce the sacrifice of those who are motivated by or responsive to higher concerns.
People become better people and more of the better people survive.
Widespread use of the Win-Win Finder thus tends us toward a less bruising and more rational, sensible world. A group of 2 or more people besides yourself. If this is mostly people new to the procedure, so that the process is likely to require several hours, you might want refreshments also on hand in service of a break Setting Up The Problem Select or state the problem. In a small boxed-in space on the center of the allotted large piece of paper or board space, write the statement of the problem. Up to the middle of either side of that boxed-in problem space, draw a horizontal line through the allotted space or large sheet.