I am following the thread carefully, but don't have anything to say just yet.
@Nilgiri ought to be here, if only to watch and to read.
@nang2 has already said in one line what I would have too
No one is changing/re-engineering human nature at vast scale at such vast extreme, without destroying humans in the process....and getting the reversals + counter-revolutions from that.
Mao and Stalin certainly "tried" their level "best"...that too within just their generation (not appreciating how long even small changes take of this size). We know how that went.
Human nature and pyschology simply has a basic rooted profit motive for livelihood and passion....once you leave the confines of family+faith (heart and soul) to venture outside for sustenance and means those two cannot provide.
We are born as, live as and die as individuals never having truly known another's reality (for we simply didnt exist as them)...that is the reality. We build society above that, but we are this fundamental brick unit. We thus intrinsically do not perceive things as a mushy hive able to switch and swap and "socialise" our existence and perceptions and senses.
Thus ultimately it is up to you the individual to choose to define how big the realm of family+faith (or more vaguely stuff that you will give to, without needing back) is i.e strictly your family (or even just yourself or not even that), maybe close friends....or if you will expand to strangers, society at large or country at large or world at large as
you personally see fit... rather than have
imposed from people you have never broken bread with...who more often than not turn out to (somewhat inevitably) be hypocrites and power-freaks themselves (that dratted human nature thing again).