ASKED to explain his support for Rick Santorum in Michigan's primary, voter Sandy Munro said, "Now what we need is a strong political leader to do something to get us out of the moral slump that we're in."

Mr Santorum would agree, having noted that "Satan has his sights on the United States of America." As would Mitt Romney, who has attacked the decay caused by Barack Obama's "secular agenda". Newt Gingrich has gone the furthest, stating, “A country that has been now since 1963 relentlessly in the courts driving God out of public life shouldn't be surprised at all the problems we have."

But what are these problems? When considering America's moral decline, my first instinct was to look at the crime rate. If Satan is at work in America, he's probably nicking wallets and assaulting old ladies. But over the past several decades the crime rate has fallen dramatically, despite what you may think. The homicide rate has been cut in half since 1991; violent crime and property crime are also way down. Even those pesky kids are committing less crime. There are some caveats to these statistics, as my colleague points out, but I think we can conclude that crime is not the cause of America's moral decline.

So let's look elsewhere. Abortion has returned as a hot-button issue, perhaps it is eating away at our moral fiber. Hmm, the abortion rate declined by 8% between 2000 and 2008. Increases in divorce and infidelity could be considered indicators of our moral decay. There's just oneproblem: according to the Center for Disease Control and Prevention, the divorce rate is the lowest it has been since the early 1970s. This is in part due to the recession, but infidelity is down too.

Other areas that might indicate declining virtue are also going against the perceived trend. For example, charitable giving is up after a decline during the recession. The teenage pregnancy rate is at its lowest level in 40 years. And according to Education Week, "the nation's graduation rate stands at 72 percent, the highest level of high school completion in more than two decades." So where is the evidence of this moral decline?

Here's one for the declinists: the number of Americans not affiliated with any religion has increased, while the number of those attending worship services has declined. And here's another: out-of-wedlock births have increased in America so that now at least four in ten children are born to unmarried women. This is something Mr Santorum has focused on during the campaign, and he is right in pointing out that the children of unwed mothers in America tend to do worse in terms of health, schooling and income later in life.

But here's where the real debate over America's moral position comes into focus. As the New York Times notes, out-of-wedlock births are increasing in much of the developed world—for example, over half of babies in Iceland and Sweden are born to unwed mothers. But according to Wendy Manning, a professor of sociology at Bowling Green State University, "In Sweden, you see very little variation in the outcome of children based on marital status. Everybody does fairly well... In the US, there's much more disparity."

So out-of-wedlock birth need not correspond to worse outcomes for children. And if it didn't in America, should we still consider out-of-wedlock births a moral problem? One could ask a similar question about religion. While rates of religious participation may be declining in America, young people today have similar moral beliefs as their parents and grandparents. So is the decline in religious observance a moral problem?

When it comes to out-of-wedlock births, the issue is complicated because discouraging these types of births may be a more efficient way of securing children than the type of nanny-state intervention that can be found in a country like Sweden. But in general, I think the debate over America's moral position comes down to this: Republicans want the best outcomes based on solutions that fit into preconceived notions of what society should look like. So even if there are few tangible harms that point to our moral decay, any move away from their vision of society is evidence of declining virtue. Democrats, on the other hand, are more concerned with outcomes, even if that means upending the way things were (or accepting that they have been upended and cannot be restored).

So in the case of out-of-wedlock births, Republicans would probably see the increase as a moral problem regardless of the outcome. Whereas Democrats might feel more comfortable with, say, promoting a corresponding increase in stable familial relationships outside of marriage. It is a dynamic we've seen elsewhere recently, in regard to issues like gay marriage and contraception. And it leads to a debate over what "moral" really means. If "immoral" means "causing avoidable harm to other people" then gay marriage, pornography, sex, reality TV, soft-drug use and euthanasia are hardly immoral, even if distasteful to some.

But as we grind through the Republican primary process, it seems like the debate over morality in America has less to do with moral outcomes and more to do with a vision of how society should look based on idealistic remembrances of how things were. So people like Mr Munro and the Republican candidates believe America is in a moral slump. The odd thing is, people on the left might actually agree, though for very different reasons. They are upset by the perceived greed of the 1%, and the broad acceptance of torture and war as foreign-policy tools. In the end, the debate over morality more closely resembles two distinct monologues.