January 14, 2015

Yep, Gasoline Lead Explains the Crime Decline in Canada Too

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Erik Eckholm of the New York Times writes that violent crime has plunged dramatically over the past two decades. But the reasons remain elusive:

There are some areas of consensus. The closing of open-air drug markets….revolution in urban policing….increases in drug and gun sentences….Various experts have also linked the fall in violence to the aging of the population, low inflation rates and even the decline in early-childhood lead exposure. But in the end, none of these factors fully explain a drop that occurred, in tandem, in much of the world.

“Canada, with practically none of the policy changes we point to here, had a comparable decline in crime over the same period,” said Franklin E. Zimring, a law professor and an expert in criminal justice at the University of California, Berkeley. He described the quest for an explanation as “criminological astrology.”

I’m happy to see lead at least get a shout out. Unless I’ve missed something, this might actually be the first time the New York Times has ever mentioned childhood lead exposure as a possible explanation for the decline in violent crime. Progress!

But while Eckholm is right to say that none of the other factors he mentions can explain a decline in violent crime that happened all over the world, he’s wrong to include lead in that list. It’s the one explanation that does have the potential to explain a worldwide drop in crime levels. In particular, the chart on the right shows the use of gasoline lead in Canada, which peaked in the mid-70s and then began dropping as catalytic converters became more common. Leaded gasoline was banned for good in 1990, and is now virtually gone with a few minor exceptions for specialized vehicles.

So what happened? As Zimring says, Canada saw a substantial decrease in violent crime that started about 20 years after lead emissions began to drop, which is exactly what you’d expect. I calculated the numbers for Canada’s biggest cities back when I was researching my lead-crime piece, and crime was down from its peak values everywhere: 31 percent in Montreal, 36 percent in Edmonton, 40 percent in Toronto and Vancouver, and 53 percent in Ottawa. CompStat and broken windows and American drug laws can’t explain that.

“Criminological astrology” is a good phrase to describe the relentless effort of US criminologists to explain a worldwide phenomenon using only parochial US data. But there is one explanation that really does work pretty well everywhere: the reduction in gasoline lead, which happened all over the world, but happened at different times in different places. And everywhere it happened, crime started to decline about 20 years later. No explanation is ever perfect, but this one comes closer than most.

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WHO DOESN’T LOVE A POSITIVE STORY—OR TWO?

“Great journalism really does make a difference in this world: it can even save kids.”

That’s what a civil rights lawyer wrote to Julia Lurie, the day after her major investigation into a psychiatric hospital chain that uses foster children as “cash cows” published, letting her know he was using her findings that same day in a hearing to keep a child out of one of the facilities we investigated.

That’s awesome. As is the fact that Julia, who spent a full year reporting this challenging story, promptly heard from a Senate committee that will use her work in their own investigation of Universal Health Services. There’s no doubt her revelations will continue to have a big impact in the months and years to come.

Like another story about Mother Jones’ real-world impact.

This one, a multiyear investigation, published in 2021, exposed conditions in sugar work camps in the Dominican Republic owned by Central Romana—the conglomerate behind brands like C&H and Domino, whose product ends up in our Hershey bars and other sweets. A year ago, the Biden administration banned sugar imports from Central Romana. And just recently, we learned of a previously undisclosed investigation from the Department of Homeland Security, looking into working conditions at Central Romana. How big of a deal is this?

“This could be the first time a corporation would be held criminally liable for forced labor in their own supply chains,” according to a retired special agent we talked to.

Wow.

And it is only because Mother Jones is funded primarily by donations from readers that we can mount ambitious, yearlong—or more—investigations like these two stories that are making waves.

About that: It’s unfathomably hard in the news business right now, and we came up about $28,000 short during our recent fall fundraising campaign. We simply have to make that up soon to avoid falling further behind than can be made up for, or needing to somehow trim $1 million from our budget, like happened last year.

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