What’s the ethical argument against incest?

A recent news article has been going around about a father-daughter incestuous relationship:

An 18-year-old woman from the Great Lakes region told New York magazine she planned to marry her formerly estranged, biological father and move to New Jersey, where she said there is no legal prohibition against adult incest.

“We plan to move to New Jersey where we can be safe under the law, since adult incest isn’t illegal there, and once I’m there I’ll tell everyone,” the woman, whose name was not published, told the magazine for its “What’s It Like” column, which explores unusual and taboo topics.

It turns out the two had been estranged since the girl was 5. Other articles I’ve read portrayed the two as having no contact until she was 17, but this one says they had minor (non-sexual) interactions from when the girl was 5 to 15. This article also indicates they’ve been dating since she was 16, but it doesn’t say the age of the father; another source indicates he was about 34. At any rate, whatever the specifics here, it’s pretty clear their relationship isn’t okay. There’s a power dynamic at play that makes it wrong. Moreover, most people would simply point out that incest is wrong. I’m wondering, though, why we consider that latter point a good enough argument.

We tend to reject incestuous relationships for two primary reasons. First, they often are not consensual. Second, they can result in genetic abnormalities in offspring. But hang on. Those aren’t arguments against incest in and of itself – those are arguments against non-consensual sex and incestuous reproduction. What if we have two sisters or two brothers? At best we may have a power dynamic at play. What if they’re twins? Or they were estranged their entire lives and only met as adults? What’s the argument then?

There tends to be an “ick” factor when we talk about incest, but that isn’t an ethical argument. It’s a feeling, and no matter how strong it may be, it isn’t a very good basis to reject an idea. Indeed, it’s actually the same reason same-sex marriage still isn’t a thing everywhere.

The article that got me thinking about this topic isn’t a good case study for talking about what makes incest in and of itself wrong, so I don’t particularly want to discuss it. It was merely a jumping-off point: What makes incest wrong? Is it that incest has higher odds of leading to genetic abnormalities? Again, that’s an argument against incestuous reproduction, not incest itself. But let’s pretend that argument does address incest itself. It also addresses people with Huntington’s disease. A person with that disease will die a painful death around middle age while also having a 50% chance of passing it onto his/her children. Those are far greater odds than any incestuous relationship produces. Who is ready to lobby for laws barring people with Huntington’s disease from sexual activity that has any chance of producing children? I’m not.

Let’s be clear, then: The genetic argument against incest is out. It’s not even on point, and even it was, it’s an argument against a lot of other types of reproduction. Moreover, it entirely fails to address relationships where children aren’t possible/would be aborted.

I’m not about to go lobby for new laws regarding incest, but it strikes me that there isn’t a good ethical argument against incest in and of itself. If, at the end of the day, we’re talking about two consenting adults who don’t have an asymmetrical power dynamic at hand, there just isn’t an argument to be had. Society would certainly ostracize anyone who made it public that their relationship was incestuous, and I can’t imagine a healthy relationship would be at all easy as a result, but the same has historically been true of interracial and homosexual relationships.

EDIT: Given some other discussions I’ve had around the Interwebs, I’ve once again had it reaffirmed that some people are genuinely too dumb to have conversations above the most remedial, superficial levels.

5 Responses

  1. I think it is a violation of the man code. (whatever the heck that is exactly) It is some sort of violation of the trust developed while raising the child. I don’t think you can go there without breaking that trust and the relationship would likely deteriorate into something undesirable eventually. I do not know any of this matter of factly, it is just my perception.

    I assume not every case would fit some sort of definitional boundaries, there are always exceptions to anything. There may well be perfectly happy father daughter (or the opposite) couples out there. It strikes me though that some sort of psychological issues would be showing up sooner or later. This would all be secondary to the details you mentioned earlier. Morality, consent, legality and genetic issues.

  2. All the arguments against incest fall away when the people involved are gay brothers.

  3. It is some sort of violation of the trust developed while raising the child.

    At the least, the case in the article borders on this. At the most, it is an outright violation. Either way, I don’t see a good argument for what’s going on there. However, the arguments against the case in the article don’t really work if we’re talking about, say, estranged same-sex siblings that meet when they’re adults.

  4. “EDIT: Given some other discussions I’ve had around the Interwebs, I’ve once again had it reaffirmed that some people are genuinely too dumb to have conversations above the most remedial, superficial levels.”

    Perhaps there is something about the way you typically argue online that dooms you to only interact with shallow, easily-angered brats.

  5. I think most people are offended by philosophical thinking and that’s the problem. Try engaging 10 random people in the famous Trolley thought experiment and watch how many whine about how unrealistic the scenario is.

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