I simply do not accept that the same thing is occuring in humans. I do not believe such explanations are sufficient to explain the sorts of totally selfless acts that some humans are capable of. However, I also accept that it is going to be very difficult to empirically confirm either my own hypothesis or the one that you are defending.
At least you realize the difficulty of your position... and are admitting that it is your own beliefs that is causing the problem. Nice.
So why is it the case that most human beings do NOT behave in this way.
Sussex must suck! Most human beings I've met in the last three and a half decades DO behave this way.
Most humans beings are selfish and do not behave altruistically apart from when there is something to be gained (favour, status, future help, whatever....). Basically, most people, if they think they can get away with it, behave like the products of an evolutionary process which leads to self-interest, not altruism.
You must have had some rotten experiences in life. I've met a lot of people in a lot of cities... and what I've found is that most people WILL do the right thing, when needed.
Why do some of us have a conscience and others have none? It seems to me that where altruistic behaviour occurs in non-human animals it always has an evolutionary explanation we can point to. This is certainly the case in all of the examples you gave. But in the case of humans, we have to claim (like you did) that the extended forms of altruism we see are simply a side-effect of the altruism we see in others - the result of group selection.
That's about right... and why wouldn't it be?
It is this inductive inference I am challenging. I do not believe it is valid. I think you are forced to offer this as a proposal because it is the only darwinian explanation avaliable. However, when you take the actual examples of human altruism that we find in the real world, those inferences are not credible.
Some examples, please? From what I can tell, human altruism fits this model rather well, taking into account the more complex cognitive abilities of the human brain.
To me, it just doesn't have enough explanatory power. It is "darwinism of the gaps" - an evolutionary "just so story".
Why? Because there's no accounting for spirit, free will, and the power of thought?
Human beings are nearly always self-motivated.
Again, I've never seen that. Humans are nearly always motivated to help their family groups. Heck, if what you said were even vaguely true, we'd never have evolved at all. Governments would fail miserably, before we ever advanced past basic tribal stages. From what I can see, humans generally work within their societies. Yes, they are often selfish; but the social/cultural impetus far outweighs/overrides the selfish motivations for actions.
Instead, if what you were saying was correct, altruism should come easily. But it doesn't.
Seems to come easily enough to most people... Seems like you've just had some bad luck with people. Well, maybe once you've left college and gotten a real life, you'll see what I mean.
Hey, I was once where you are now. I thought I knew everything. I was in college, I studied philosophical giants, I saw my fellow man as rotten and vain. Then, I grew up. I got a real life, and saw things as they really are. Those philosophical giants? Mostly silly old men, trying to make a living by NOT working. And my fellow man? Basically good, no matter what they believed or talked about. Most people will help out when they can, even risking their own lives, when necessary. I see it all the time. That you don't, makes me wonder.
Maybe you're hanging out with too many Christians?