Democracy
The issue is not capitalism versus communism or democracy versus dictatorship, but the concentration of power at all. There are some things that are just true. Self evident, demonstrable and true. 'Mankind will abuse power' is one of those. An example of a generalization that reinforces a point there; not all people will abuse power, but the average will. You can dress up this fact in many different ways; the belligerent dictatorship, corrupt communism, or the diplomatic democracy.