““When we, system dynamicists, see a pattern persist in many parts of a system over long periods, we assume that it has causes embedded in the feedback loop structure of the system. Running the same system harder or faster will not change the pattern as long as the structure is not revised. Growth as usual has widened the gap between the rich and the poor. Continuing growth as usual will never close that gap. Only changing the structure of the system—the chains of causes and effects—will do that.””