Martin Cothran has, he likes to remind people, written a book on logic, and teaches the subject at the high school level. Alas and alack, this stooge of the Disco. Inst. and Focus on (your own damn) Family cannot seem to apply it correctly in his writings. Today, he illustrates rather starkly the ecological fallacy while making the not-at-all revolutionary observation that wealthier Americans are skinnier than poorer ones:

Now comes more evidence that poverty in American is characterized chiefly by eating too much. The report, from the Robert Woods Johnson Foundation, has Mississippi, Alabama, West Virginia, Tennessee, and South Carolina as the five states with the highest rates of obesity. It does not make any claims about the relation between poverty and obesity, but what do you want to bet that if you took the mean income and compared it to the level of obesity, you would have a strong correlation?

Then Cothran confuses correlation with causation, which would be invalid even if he had data showing that correlation.

And of course, there is a relationship to be found. Wealthier Americans tend to be thinner than lower middle class and lower class Americans. I haven't seen data on people below the poverty line, so I don't know how far down the income scale that trend persists. But obesity is a bad measure for adequate nutrition. Food isn't just about caloric intake, it's also about vitamins and minerals, essential amino acids and lipids. People get fat because calories are cheap. Corn syrup is subsidized so that it's sold below the cost to produce it. It's cheap and easy to bulk things up on calories.

You can get a few thousand calories for a couple dollars at McDonalds, but those are calories from fat and processed corn. The food is laced with preservatives and pesticides, and it's missing vitamins and minerals. Someone who lives on fast food for a month will wind up malnourished in a meaningful sense, but won't have lost weight. He'll be unwell and obese, poorly fed but not hungry.

Good food costs money. Most organically grown items at the farmers markets I shop at cost 2-3 times what a conventionally grown item might cost at a supermarket. But I'll pay it, because it encourages local agriculture, because I don't have to worry about pesticides, and I don't have to fear the preservatives and additives that are added to everything up to and including raw meat at the supermarket. It's healthier for me, for my community, and for the environment. But it costs money. Turns out I can fill up on greens just as well as on Fritos, and it doesn't cost that much more, and it doesn't make me obese.

There was a striking moment in Food, Inc. that illustrated the problem. A family is talking about the challenge of feeding 5 mouths on two poorly-paid salaries (I think they worked at a meat processing plant). Their budget requires that they spend no more than a dollar on lunch for each family member. At the supermarket, the single pear the youngest daughter selects would blow her whole lunch budget, while the same dollar would buy her a hamburger and a soda at a fast food joint. Understandably, she chooses to buy the more filling, but less healthy, fast food.

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Cothran dismisses "people who are claiming there is a 'hunger' problem in America" when 4% of the population in the richest and most powerful nation on the planet cannot get enough to eat. Someone's heart needs to grow a few sizes.

The USDA adds that, as of 2007: "Overall, households with children had nearly twice the rate of food insecurity (15.8 percent) as those without children (8.7 percent)." That trend is worrisome because malnourishment (in terms of nutrients and calories) affects a child's growth and mental development. These kids may be fat (which puts them at risk for diabetes), but they aren't getting vitamins and essential fatty acids needed for a growing brain. And the calories they are getting come alongside pesticides and preservatives which mimic the effects of naturally produced hormones. Hormones which control how and when different body parts grow. Hormones that determine whether male or female genitalia grow. Hormones that induce puberty. This is not small potatoes we're playing with.

Rates of food insecurity are up in recent years. Very low food security was found in only 2.85% of families during the Clinton years, rising to its current peak during the Bush administration. Eleven percent of families may not seem like much, but even one family going without food is too many. Cothran can mock all he wants, but it would be nice if he didn't demonstrate his logical incompetence while he's at it.