Ok, there were quite a few posts since my last, and many of them didn't seem to read the line where I noted that I was not referring to welfare for those who cannot help themselves. I'm perfectly willing to argue against the morality of that, too, but I wasn't. My concern, if you will, is with the idea that those who work should support those who will not, as per Saede Riordan's comments.
Now, while it is true that some tribal societies are egalitarian, tribal societies also tend to lack technological progress, and tend to have a high level of conflict with other tribes. The tribal model allows egalitarianism because members of a tribe are likely to be related to you genetically. However, tribal models cannot compete with more complex societies, and tribal societies do not offer participants the optimal chances of having their genes passed down. It should also be noted that even "egalitarian" tribes are usually not free of social status, ostracization, and violence. Indeed, the farther we have moved away from the tribal model, the less violent towards each other we have become.
My central idea, however, that genetic evolution requires ultimately selfish behavior, has not been challenged, except by reference to a girl being raised by wild dogs. Wild dogs, I assure you, are also selfish organisms. Raising the young of another species is a misfiring of maternal and paternal instincts, not evidence of the universe being charitable. As well, a child adapting to life as a wild dog is merely an incident of an organism seeking survival by any means.
The problem is not that you cannot convince some humans to try to be angels, the problem is that our universe is constructed in such a way so as to make self-sacrificial behavior an ultimately extinctionist enterprise. Consider the following problem:
Suppose that the population consist of 50% willing layabouts (that is, those whose are willing to stop working if they can), and 50% hard workers (who will work no matter what). Now suppose that we institute a rule whereby a basic and comfortable standard of living is guaranteed for the entire group, the cost to be born by those who work. The layabouts will promptly proceed to not work, because work requires an expenditure of energy that, in this case, they need not expend. Therefore, the hard workers no longer bear the burden of their own lifestyle, but now, two times the burden. This effectively penalizes working, especially when, by joining the layabouts, you can survive without having to work 8-16 hours a day. How long do you suppose hard workers will continue working?
Those who do make a study of human economic behavior generally agree on one point: it is overwhelmingly self-interested. That's not to say that humans can't or won't help others, but rather that they are first and foremost concerned with the comfort of themselves and their direct family.
Again, a thought experiment: if you do believe that every human has the right to a house, a living, and food, and that materials to provide it should be taken from those better off, why have you not sold your computer and other luxuries to provide for those badly off in, say, South America or Africa? At the very least, you could sell all your entertainment materials and other unnecessary accoutrements.
As for the instincts for violence, survival, and competition, it's quite easy to acquire knowledge on the subject. Richard Dawkins, in The Selfish Gene, makes most of these points. He is not inclined to like them, however, and exhorts his readers to "rebel" against their selfish genes, a demand that was met with some level of ridicule for an otherwise excellent book. Michael Shermer has some excellent work on the subject, and there are enough books on economics and human behavior, from The Wealth of Nations to Super Freakonomics, that I think I need not describe a library. Suffice it to say that the motive of self-interest on the part of humans and other organisms is now considered a settled proposition.
Now, while humans will not always do things "just" for profit, it is also a settled proposition that you can increase or decrease the rate of certain behaviors by the amount of economic benefit a behavior provides. Jail, for instance, is above all an economic proposition. Your time, which you normally may spend according to your desires, is dedication to sitting in a cell. This is an example of an extreme disincentive. On the other hand, making millions of dollars playing a professional sport is an incentive to continue participating in professional sports. It may be that there is a champion tether-ball player out in the world, but I doubt he is as motivated as Michael Jordan was.
Human nature is inherently greedy, but I agree that it is the environment that is to blame. That is to say, it is the environment that has molded our genes to operate using a model of limited resources. Again, however, to argue that resources aren't limited is to contradict the evidence of the world around us. There are limited resources at any one time, and we all (or almost all), even billionaires, would like to be more comfortable, more entertained, have higher social status, and more be wealthier than we are now.
However, I am not one to say that we cannot be "better", or at least "different". I'm a trans-humanist, and I want - desperately want - humans to transcend the needs of flesh and bone and earth. I think that a space-faring civilization of human brains that have been copied into electronic mediums would have fewer problems with scarcity. It would still exist - our universe has a finite amount of matter in it, according to most theories, but it would be greatly reduced. But we won't get to that point by trying to live tribally or denying our genetic heritage.
But, and lastly, I would like to ask, why is it moral to see that everyone survives? I don't consider that to be morality. It seems to me that it's a borrowing of Christian ethics, which I do not accept. I don't think every life is precious, nor do I think that a society should consider every member worth preserving. In fact, I can think of several members of the human race that the rest of us would be better off without - should those persons come to need saving. By what standard would you demand that the competitive and capable sacrifice for others, even if you were right? What makes egalitarianism a good thing? Ciarente can make arguments for my helping others out of my own self-interest - which, incidentally, I wasn't arguing against. But Casiella and Riordan, you seem to believe that we should give because it is "good". I do not. Can you show me why I should think otherwise?