You can't think of perfection in relative terms. You can never make every human happy, and the reason is quite simple: some people are wrong.
Perfection can be gained, however. Once it is determined by the iron men, we can then seperate all human actions into Right and Wrong, Good and Evil. Those who agree with the perfection are Right. Those who disagree are Wrong. It's quite simple and logical -- when a being incapable of error produces the model for the perfect society, it, by definition, has to be perfect. There's nothing else it can be, since anything else would be an error.
But not all people will percieve this as perfect. Humans, being greedy, selfish, hubristic creatures by instinct (as all natural creatures are) will think about what is perfect *for them*. This may or may not fall in line with what is truly perfect, determined by fact and logic. If it doesn't fit, they're going to think that this perfection is wrong, when, in fact, itis they who are wrong.
There is nothing inherently imperfect about a disagreement. Those are a product of humanity attempting to find and perfect itself, which is an attempt to be perfect, and so allowable. However, in the course of events, humanity will produce things that are imperfect, flawed. But, because we all care about ourselves and those things we think of, we will keep them alive anyway, regardless of their erronius and harmful nature.
This is a Bad Thing. Alone, without something incapable of error, we could not and would not develop perfection -- we love flaws, we care about our failures. In a perfect society, no compassion would be given to the evils that counteract it. If you think that the society is imperfect, it is you who is wrong -- the society cannot logically be imperfect.
Take that idea too far, start fermenting revolution and instituting a new society, and you're past the point of no return. A perfect society would have no choice but to either convince you that you are wrong, or, failing that, eradicate your ideas before they are accepted by others. Kill you, advance humanity; save you, limit humanity....not much of a choice, in my book.
Disagreements will occur. But a disagreement with perfect beings is an act of evil, holding humanity back and limiting it's progress (which a perfect society may facilitate), if it goes too far.
You see, humans, blinded by biases, cannot see the perfect society. They would be too concerned with happiness for all and acceptance for everything. Perfection is not what you precieve it to be -- it is an absolute, one that we cannot find for our perceptions, but one that we may be able to hold secondhand, through creating creatures who cannot err, who can never make mistakes or do something wrong. Once we create something incapable of error, it can find the absolute that exists, because it cannot be sidetracked, it cannot be mistaken. If an absolute exists, it will find it.
Humans are incapable of pure logic. But we can create something that isn't.
P.S. Perhaps no absolute exists, of course, but this character is speaking in an age where sentient machines have already created a "perfect" society. Everybody's happy, and not the kind of happiness-masking-pain, no, truly, originally, happy. Life is good, and no dissenters exist (having been wiped out long ago). The character is speaking to the main character, a robot with the "flaw" of finding no perfection in the society...
Maybe I'm going a bit overboard on the personality, but this is very religious to her....you can probably see where this crosses bounds with religion and faith...perfect beings telling you what the perfect society is...the book is tentatively called "Dirge for an Angel in Binary Code"....about humans, sentience, angels, gods, devils, and the inability to seperate them. ^_^
Want one? Tell a publisher, maybe they'll pick it up.
End P.S....