The extent to which Roe v. Wade has come to dominate American politics can be found in the anguished cries that followed the announcement of Justice Anthony Kennedy's retirement from the Supreme Court. There are other issues that people care about, but Roe forms the centerpiece of any discussion about what a post-Kennedy court might look like.

I am myself uneasily pro-choice. Moreover, just a few days ago, I argued that the increasingly bitter judicial wars tearing apart today's politics can only be ended with more judicial deference to legislatures and to precedent. It stands to reason that I would be dismayed by the politically electrifying prospect that Roe might be overruled entirely. But I wouldn't be dismayed. I'd be glad to see Roe go, as quickly as possible.

How can someone who calls herself pro-choice oppose Roe v. Wade? Let me count the ways.

The decision itself is a poorly reasoned mess. It failed to mount a convincing case that the Constitution contains language that can be read as guaranteeing a woman's right to abort her pregnancy. Nor have the subsequent courts that amended and extended Roe managed to come up with a constitutional justification.

That poor drafting, quasi-accidentally, left America with some of the most permissive abortion laws in the world, far beyond what most legislatures would permit if the matter were open to public debate. Today, the United States is one of only a handful of countries to allow elective abortions after the 20th gestational week.

And that, in turn, is the biggest problem with Roe: It has given the most religious developed country in the world one of the world's most permissive abortion laws. The abortion law is out of step with what the majority of the population wants.

With the Supreme Court having, in effect, written abortion law covering the first two trimesters of pregnancy, offering an opinion about abortion is costless. Pro-lifers can say that abortion ought to be outlawed even in cases of rape and incest, knowing that they'll never have to look a rape victim in the face and explain why she had to carry her attacker's baby to term. Pro-choice advocates, meanwhile, don't have to directly advocate allowing second-trimester abortions; the Supreme Court removed that burden. No wonder abortion politics are so polarized and poisonous.

Somewhat paradoxically, the way to make abortion less contentious is to throw the matter back to the states so that people can argue about it. Debating the difficult decisions regarding gestational age and circumstances would force people to confront the hard questions that abortion entails, which tends to have a moderating effect on extreme opinions.

Returning the matter to the states would give most people a law they can live with, defusing the rage that permeates politics and has more than once culminated in acts of terrorism against doctors who perform abortions.

Megan McArdle is a Washington Post columnist.