[jfengel]

Most people are willing to draw compromises, even on abortion. Most people who favor the right to an abortion will accept a line somewhere; many are content to accept the trimester system. Most people who wish to ban it still allow exceptions, such as rape, even though that seems inconsistent with it being really about murder.

It's an issue that easily admits being amplified by tribalism, but it doesn't have to be. We don't have to be at war over it. There exist compromises that aren't internally consistent but satisfy the moral intuitions of a large majority of the country.

Instead, we're at war -- not because of the issue itself, but because the issue is presented as one where we have to be at war about. They're not looking for a compromise, even among their partisans who would accept one. They're looking for a war, because that war is used to keep their opponents out of office on all issues.

It's an effective strategy for winning. Compromise doesn't make you run out to the polls. It doesn't matter how many parties there are. The winner is the one with the most votes. It's easiest to get the most votes when you believe that you are the only ones who are morally righteous, and everybody else is guilty of the one crime that every single person thinks is wrong all the time -- murder.

So I believe that it's not stronger than "identity". Identity is how you win elections. Abortion happens to be a great issue for sharply defining identity, but if it weren't that, it would be something else. And along with it comes every other issue that you've managed to agree with your partisans on: you win every argument for free.