Contribution asks a related but different set of questions. The first question is “How did we each contribute to bringing about the current situation?” Or put another way: “What did we each do or not do to get ourselves into this mess?” The second question is “Having identified the contribution system, how can we change it? What can we do about it as we go forward?” In short, contribution is useful when our goal is to understand what actually happened so that we can improve how we work together in the future. In
