buybuydandavis comments on Politics Discussion Thread January 2013 - Less Wrong Discussion
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Let's get a bit meta. I posit that there are certain political discussions where rational debate is entirely useless, because they largely consist of choosing an axiom. Abortion is the most obvious of these - people who believe the right to life begins at conception(usually for religious reasons) are almost universally pro-life, and people who do not are almost universally pro-choice. It is not possible, even in principle, to convince either side of the other's position, because there's no argument that can change an axiom.
It's good to keep our limitations in mind.
Edit: To clarify, I don't claim that rational debate is useless at discussing issues around abortion, I claim it's useless at changing the minds of someone who has a strong position on the issue. The only people I have ever seen switch sides on this issue are politicians(who are obviously lying) and religious converts(which is in principle achievable from rationalism, but which is in practice a pretty rare result).
If someone believes something about the moral implications of conception, that is something they likely just took in as a social truth, and then later learned and crafted a rationalization for. I don't think we have moral instincts about cellular organisms.
To the extent that their in group remains constant, it would take a lot of serious moral argument to overcome that social truth. The problem with political arguments is that people don't seriously have them. They volley a couple of bumper stickers at each other, and then go off in a huff. They may do it a million times - but a million bogus arguments designed to achieve nothing individually will likely achieve nothing in the aggregate as well.
The social truth remains intact - no serious moral arguments oppose it - why would we ever expect a change?
Where you might expect a change - when one moves between social groups, or when one commits to and is capable of serious moral argument.
The social aspect is at least theoretically testable - how big are the moral shifts when people change in groups? I suspect pretty large.
And in the relatively rare ideologue class, the shifts are often pretty big too. I knew a gal who went from seminary->Leninism->WIcca/EnviroProgressivism. Lots of atheist ideologues are former fundamentalists. Conservatives who were former marxists.
Arguments work on people who engage in them. I'd guess that a changing social truth works even better on most.
This kind of stuff happens very often among people in their late teens in my home town. (Most but not all of them just support political ideologies the way they'd support football teams.)
That's it.
A small class of people care about and are interested in ideas. You can change their minds through argument. The vast majority are Green Team Blue Team, and they change their ideology if required by a change in their social affiliation.