Abortion is one of the most politically-charged debates in the world today - possibly the most politically charged, though that's the subject for another thread. It's an excellent way of advertising whether you are Green or Blue. As a sceptical atheist who thinks guns should be banned and gay marriage should be legalised, I naturally take a stance against abortion. It's easy to see why: a woman's freedom is less important than another human's right to live.
Wait... that sounds off.
I really am an atheist, with good reasons to support gun bans and gay marriage. But while pondering matters today, I realised that my position on abortion was a lot more shaky than it had previously seemed. I'm not sure one way or the other whether a mother's right to make decisions that can change her life trumps the life of a human embryo or fetus. On the one hand, a fetus isn't quite a person. It has very little intelligence or personality, and no existence independent of its mother, to the point where I am comfortable using the pronoun "it" to describe one. On the other hand, as little as it is, it still represents a human life, and I consider preservation of human life a terminal goal as opposed to the intermediate goal that is personal freedom. The relative utilities are staggering: I wouldn't allow a mob of 100,000 to kill another human no matter how much they wanted to and even if their quality of life was improved (up to a point). So: verify my beliefs, LessWrong.
If possible, I'd like this thread to be not only a discussion about abortion and the banning or legalisation thereof, but also about why I didn't notice this before. For all my talk about examining my beliefs, I wasn't doing very well. I only believed verifying my beliefs was good; I wasn't doing it on any lower level.
This post can't go on the front page, for obvious reasons: it's highly inflammatory, and changing it so as not to refer to a particular example would result in one of the posts I linked to above.
The trouble with this reasoning is that universally accepted norms cannot be based on lines drawn at arbitrary points. There must be a strong focal (Schelling) point where the lines are drawn, or otherwise they will soon be pushed in one direction or another. Or to put it differently, slippery slope arguments usually have at least some validity.
With this in mind, arguments against things based on placing them into common categories with bad things can be perfectly valid in a very important sense. Yes, they usually produce powerful propagandistic rhetoric as a side-effect, and sometimes that is their primary purpose. However, often there are no convenient focal points where you would ideally like to draw the lines, and the best available focal points are around some much broader category, so if you won't draw the lines around the broader category, there is a very real possibility that some pressure will push them all the way to things you'd definitely want to prevent.
So, for example, people who want to draw the line so as to condemn all eugenics (under some coherent and widely accepted definition of the term) have a workable focal point to defend. In contrast, if you'd like to draw the lines around some forms of eugenics and not others according to some sophisticated ethical analysis, chances are such norms would be unstable and the lines would soon be moved in one direction or another.
In this particular case, birth seems like an excellent conservative line.