Dissident Dan said:
The "what works best" method, as stated, is incomplete. Works best toward what goal? Why is this goal valuable?
I've just had several pages of debate with Canute on this exact point in the thread "Proof of Reality" in epistomology. If you are interested in more depth than I am going to cover here, you might read that. But . . .
The statement about what "works" is derived from philosophical pragmatism, and my personal observation that that we have emerged from (relatively) fixed universal conditions. For example, immediately surrounding us is biology, and surround thating is nature, and surrounding that is the universe's physics, and some feel surrounding that is something metaphysical.
All these interdependent conditions are either fixed or so established after billions of years of development, they usually can't be changed in a short period of time, or if they can (such as nature) it often results in damage to the overall system. The bottom line then, is that it's usually best to harmonize with such powerful forces, and that includes both in one's behavior and also when designing human systems where the issue of power is important. So when I speak of how something "works," mostly I mean how well it harmonizes with universal or, for life, natural conditions (there are other aspects to philosophical pragmatism discussed in that other thread).
When it comes to humans, evidence something is working is the ease of implementation, duration, and how well the people thrive. History provides plenty of examples of how detrimental to ease, duration and thriving that power abuse can be. That's because power abuse always results in the loss of individual power, and powerless people are rendered ineffective (that's why we imprison criminals). Even in business (where there's been, and still is, lots of power abuse) it's being learned that empowering employees is good for business. If people didn't have a nature, maybe we could treat them any ol' way and they'd still be productive. But that hasn't proven to be true.
So I say, it just doesn't "work" in the long-term to say, if I've got the might, then I get to determine what is right because there are several layers of a much bigger universe which already has lots to say about what is right, and what works.