No, they're not. Well, they might be if we stop inventing things, but if you're over 30 and have multiple surviving offspring, you're doing quite well as far as animals go. If you've never really had to go hungry, thirsty, or cold, you're doing ridiculously well. If you're guaranteed to live to 60, have various electronic entertainments available, are carried where you want to go by a car, and can visit a trained specialist for most things that go wrong with anything, you're doing well even by human standards, which are ridiculously above any semblance of natural order. To imply that you then won't find
yet more things vital to your wellbeing, like treatment for cancer or replacement eyes, is simply ridiculous. If there was any such thing as "enough" we'd have hit it with agriculture.
I think the only economic model humanity needs is as follows
1. If you have more than you need, share.
2. If you don't have what you need, find some one who can share.
3. If no one is able to share, set about producing it.
4. If you can't do it alone, get help.
Furthermore, this seems to confirm that the system you're advocating is "Capitalism, but everyone's nice to each other and there's no central government."
Not only does this run full-force into the eternally-stated Communism problem of "But why would they bother to work?", it runs into the issue of who's going to be enforcing this system with no central authority. Earlier you admitted that if we started fresh, and everyone was trading goods and services, the most ambitious would snowball into control of everything. This seems to imply that you know Capitalism is natural. But, in spite of this, you want to let people manage themselves, but on the notion that they follow the above plan. Well, why? Who's going to make them do it? Supposing a group of people doesn't mind if the king gets a slightly nicer hut, and it snowballs from there? Supposing one self-governing group decides it'd be awesome if they started manipulating prices to gain control of other self-governing groups, who lack the organization and knowledge to realize what's happening and put a stop to it?
What you are advocating, literally, is Utopia- a place where everyone lives in peace and harmony and freedom, simply because that's how things work. Unfortunately, that's
not how things work. It would be great if birth defects didn't exist, but they do. It would be great if people weren't often greedy and stupid, but they are. It would be great if we could all just stop being dicks to each other for no benefit, but we can't. If you can find a specific solution to those problems, great- but even then, there's likely to be unpleasant side effects. If you figure once everything's nice because everyone is nice, everyone will be nice... well, aside from the difficulty of getting it to that point, it's just not going to hold on its own.
Incidentally, Realmfighter is not a
complete troll. "People are dicks" is a very real, very ancient, very well-known problem, and it goes far, far deeper than living amongst dicks.