Power is relative change within a complex system. There are two types of power: Influencing change through responsibilities or forcing change through the usurping of responsibilities. The first leads to new qualities while the other leads to destruction.
Tyranny is forcing concepts or actions at the wrong hierarchy of dependencies in a complex system. We have seen this over and over again in complex social systems, but this also takes place in complex software systems. Tyranny should be avoided in any system if that system is to endure the test of time.
Goals should be quality based. Since quality can't be measured, one will have to use techniques like nomological networks and human judgement to gage if one is achieving their goal.
LongLoft - Code Writer 