it is hard to have a strong opinion on favor of strong societies instead of atomized individual nihilism
Curious way to put it. I agree with Dawkins and others who say
"we need to take back Morality from religion". The problem with the nihilistic (imma lump in atheist/agnostic there) and by extension the whole postmodern viewpoint of this century, is that it offers no sensible ground from which to build an ethical societal structure -- though it capitalizes on personal ethics quite well.
So any inter-personal moralism is felt as stemming from the same dogmatic trajectory from which religion and other outdated ideologies emerged -- and is subject to the same suspicion and realitivization. But I think what we need is to develop a new morality stemming from our modern information-rich era, which (when you look closely) actually offers more in the way of dependable sources for ethics; build around biological and psychological human needs.
also;
@Pressure's Spring - A 40+ year old father who marries his 18 year old daughter, claiming the two are deeply in love, would present quite a suspicious situation, wouldn't it. What if the father's influence during child-rearing lends to this sort of affection?
In such a situation, I think what we need is some achitecture for "the role of the father", "the role of a son/daughter". Psychology tells us how important it is for the parent to provide certain things to the child, and if psychology can provide a type of
social obligation to parents to do this -- based on what research shows -- then the role of the parent is well defined; and isn't one of romantic attraction.
Rather than being arbitrarily dogmatic about it, we can look at parent-child incest as a signal of unhealthy psychological complexes (re: Oedipus/Elektra) and address the matter more fairly.
But I find up to 10 years of incarceration totally hilarious. Incarceration is about taking people who may be damaging to others, out of society and placing them in quarantine. In a case like this, that does no good. They aren't really endangering anyone: the problem is within the person. Mandatory therapy and a revocation of marriage license is as far as I'd go.
also;
If the parent was actually not the guardian (for example, was absent for the whole of the child's upbringing) then the two really are strangers -- a la the Oedipus myth itself, which was accidental incest -- then I don't really see that as violating any moral values; although it is quite an ironic and rare situation.
The same really is true for step-sisters or brothers, who merge into a new family after initial infancy has passed. Romance could develop there as well, and the matrimonial ties of the parents are a circumstance without which the romance would be quite appropriate. Hence, it suddenly becoming inappropriate because the two children's parents happen to love each other romantically as well, seems somewhat unfair. There's definitely some grey area here, which I think is probably always gonna exist.