Lately, I\'ve become a believer in the limits of reductionist explanations espec

Question

Lately, I've become a believer in the limits of reductionist explanations especially in areas like complex systems and biology. So, without wasting any more time, I'll get to my question..

Whenever we think of something like cooperation, the most common explanation that comes up is that of genetic fitness. It is said that evolution would have selected for psychological mechanisms of cooperation because it is beneficial in a society in which reciprocity is possible. You scratch my back, and I scratch yours. Add to the mix the ability to name names, and reputation becomes a kind of proxy signal for fitness.

Now, the major problem I have with this is does it all have to boil down to fitness? Can't it be a phenomenon that is culture-specific? Different cultures go to different lengths to help a stranger. Yet, we all share the same evolutionary history. This seems like a strong indicator that cooperation can't be reduced to one's genetic or reputational fitness alone. Should the study of cooperation be handed off to the anthropologists?

Explanation / Answer

I think that in terms of 'tribal' fitness, altruism would be strongly selected for, as communities would tend to be quite small (relative to, say, a town today). In modern civilization cultures have developed differing levels of altruism, but I imagine this is a result of upbringing rather than inherent differences in tendency toward altruistic actions.

So in my opinion you cannot rule out altruism being selected for because it is clearly an advantage (in terms of survival / fitness) in smaller communities - we just don't live in that kind of society any more; people don't have to be altruistic to get by, and this kind of mind-set can 'evolve' culturally, outside genetics. But on the whole I would still argue that most people are inclined toward altruism - ether because they feel naturally inclined to help others, or feel that by helping others some benefit (such a reputation) would be bestowed upon them (the former may be the same as the latter, but at an unconscious level).

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