angrysoba
Philosophile
I think that's an important point, and it mostly goes back to people searching for a label or explanation for why they feel something should or should not be done, that goes deeper than a logical reason.
It's easy to see why one needs to set one's alarm clock, but why not kill fatally ill babies, for example? Well, you just shouldn't do that. But why? Well, it's immoral. (Or the other common explanation: God forbids it.)
Yet the actual reason for that opinion may only be because we have a strong inborn urge to care for our offspring no matter what, because those who didn't, didn't have offspring live to maturity and pass on their genes. But that's not how it feels.
If morality is based on a combination of natural urges that have been inbred into us and are expressed in a certain way in a particular society, those urges may feel as if they're greater than ourselves, or greater than any need to justify them with a logical reason, or the logical reason may be after-the-fact reasoning to justify what we "just know" is wrong.
People need to label those feelings with something greater than the alarm clock example, so we've invented the term morality.
In another society, of course, killing unhealthy babies may feel morally right. We've got that urge inborn in us too, because it saves limited resouces for those with the best chance of living, which is why even in first world countries there's a debate about whether it's moral to abort fetuses who have devastating abnormalities. But again, an individual might argue that it's "just wrong" to force a baby to be born only to live a short, suffering life, with a sensation that it's greater than logic--it's morally wrong.
Well, I don't doubt that there are "strong in-built urges" towards all kinds of behaviour.
Yes, one of those is surely towards caring for offspring to the extent that parents will subordinate their own needs to those of their children, and yet it may serve as both an important pre-requisite for moral decision-making and yet could also cloud rational judgement.
And yes, as you point out, there are cultures which practice infanticide and not only for sick babies, but even for healthy babies. If we look at evidence for "proto-morality" in other primate species, which is useful from a descriptive point of view, it appears that some male primates kill the offspring of rival males before mating with the female whose children he has just murdered (to put it into emotive terms).
This is why I have said that from a descriptive point of view, morality can be explained by empirical science - or at least we have been able to come up with some plausible theories for the origins of morality - but that it is still not enough to jump from description to prescription.
In fact, there is a lot of perfectly good evidence that "strong in-born urges" don't always work out in ways that we intuitively call moral. As we have already talked about, attitudes towards race and rape have changed over time, and the same goes for treatment of animals.
Similarly it could be argued that our in-born urges prejudice us towards members of our family over strangers. In most Western countries what is considered nepotism might be considered perfectly normal behaviour in other societies. I think Pinker came up with the rhetorical question, "What kind of guy would give a job to a complete stranger over his own brother?"
Our in-born urges also prejudice us towards people who are attractive over ugly people, or people who have shared some of our experiences, or simply well-defined people over a mass of undifferentiated people. An example I have brought up before which Tassman often talks past is the question of whether I should buy my son an expensive Christmas present or donate the money to repair an orphanage's leaky roof in a far away country. Empirically I think we know that most people choose something like the former rather than the latter. Again, evolutionary traits are not helping us out.
And in the example of the Hedonist that I outlined before, in my example I was clear to point out that the person behaving that way was not doing anything illegal (or if he was then the authorities would reliably turn a blind eye) and then asked how evolved human nature helps us out. Tassman has a Panglossian answer:
Tassman said:As to how we derive such a code our moral decisions will be based, as they have been through all of human history, by a combination of factors ranging from tribal traditions, social acculturation, philosophical arguments, scientific knowledge and general consensus regarding the best interests of the community. If you choose not to conform to the rules of the group then you will be considered anti-social and, in the event of criminal action against the group, incarcerated.
Yet this is platitudinous at best and false at worst. It is circular reasoning if you say that what is moral is that which is what society lets you get away with. If you have some unexpressed idea about what genuinely is moral behaviour, on the other hand, it is wishful thinking (or even theistic thinking on Tassman's part) to think that transgressors will always get their comeuppance in the end.