Greetings! Yes, I agree that a fundamental for us is to evolve. I include that intention along with healing and balancing. These three form a very strong, self reinforcing 'pyramid' ironically!
We all have our own natures and not everyone shares a single 'human nature' by any means. If we did, then there couldn't be any leaders as we'd all either be leaders or followers - the fact that we have both shows that we don't all have the same nature.
I am suggesting evolving our own nature to a state of balance where we are united as one, yet individuated simultaneously. The guidance we need can come from the inside, from the feelings that are deeply rooted in self and the Earth - plus beyond. We have an inate, internal compass - unfortunately, it is damaged in most people at the moment due to long standing denials.
if the centralization of power in this instance is completely voluntary, then the person(s) giving up that power can take it back whenever they want or need it.
That's true in some cases, however, sometimes it isn't obvious how to recover the power and some time people don't want to give it back. I can voluntarily agree to be 'ruled' by a government but strangely enough they seem to not want to stop doing it. ;)
Your final observation is correct. Since we literally die if we give our power away, it is imperative that we stop doing it and then heal, balance and evolve. It's not possible to know in advance what the outcome of such deep changes will be, but we can know right now that change is needed and is coming. :)