Lenin advocated for revolution, which is the problem. Communism, as loaded as that word is, boils down to an economic model that may or may not work. Mostly, it doesn't, because there are too many opportunities to cheat, and too few incentives to play ball. But communes exist, here and there, among like-minded individuals who take it upon themselves not to fuck each other over. But on a broad scale? I wouldn't bank on it.
But none of that matters. Because large-scale communism has never existed. Not because communism is evil... it's because communist revolution is evil. The revolution part gave Lenin, Stalin, Mao, Pot (Pol), Kim, whomever, the carte blanche to do whatever to whomever they decided were enemies of the "revolution" (i.e., their rise to power). Even today, years after they've been established, the enemies of the "communism" they supposedly practice in China and N. Korea are called "counter-revolutionaries", because once in place, the "revolution" is never finished. The goal of the "worker's paradise" is never accomplished because of this enemy or that enemy, foreigners abroad or traitors among us. And as N. Korea has shown, it can perpetuate down three whole generations of decadent leadership without an end in sight, even when the citizens are literally starving to death.
Why the fuck are we talking about this? This thread is supposed to be about open-source Darwin from Apple. But I've seen the light. Communism, real actual "communism" as an economic model, is not "evil"... let alone, it will just fade away for the inefficient, unworkable mess that it is (unless your Amish, or hippies, or some other group of super-like-minded individuals who just get up each day and make it work). Revolution is the evil. The U.S. got real lucky with theirs, having only to defeat an enemy a continent away after centuries of working, civil self-governance behind it. But lots of innocent heads rolled in the French Revolution before they got that all sorted out. Since then, every "revolution" I can think of has become a complete fucking blood-bath that propped up a tyrant, and it didn't matter what the reason was... communism, socialism, Islam, cultural purity, racial purity, even (the promise of) democracy. As soon as some leader shouts "revolution!" waving an axe-handle or an AK-47, that's code to angry young men for NO RULES! Loot, rape, kill, pillage, turn-on-your-neighbor, eat-your-children, shave you head, run for the hills, complete fucking ANARCHY. All is us vs. them (and you, probably, ain't in the "us" department).
In the end, like a wildfire, it burns itself out, since revolutionaries generally SUCK at producing anything, especially things that take time (and therefore capital), like food. Sometimes it takes a few generations (U.S.S.R., N. Korea), sometimes it takes less than one (watch... the days of ISIS are numbered, particularly as they lose control of those oil fields, the only source of hard currency they need to buy shit like ammunition and... food). China has been successful because Mao died and his successors have largely let the population do what they've done well for millennia... get shit done, and occasionally throw a bone at whoever is occupying the Forbidden Palace THIS time.
So, don't get your panties in a bunch over trip-wire words like "communism" or "socialism". That's just people thinking people oughta chip in a little, for the good of everyone. Get real suspicious of the guy who cries "revolution" or "overthrow", or anything else that gives him some self-authority to kill people and set himself up as herr Führer who will lead all proper people to paradise by eliminating the riff-raff. THAT's the guy who's gonna fuck everything up.