How is it that those with power seem to gain even more of it over time? And why do the disadvantaged seem to lose what little power they have, becoming increasingly reliant on those in positions of influence? If these dynamics are based on either divine or natural law, as some might suppose, then nothing can be done to change them—which is convenient if you’re one of the powerful. But if you believe this pattern of behavior can be changed, then you need to understand what drives it. And the answer is simple: structure.