Did lead in gasoline cause crime?
In the early 1990s, a surge in the number of teenagers threatened a crime wave of unprecedented proportions. But to the surprise of some experts, crime fell steadily instead. Many explanations have been offered in hindsight, including economic growth, the expansion of police forces, the rise of prison populations and the end of the crack epidemic. But no one knows exactly why crime declined so steeply.
The answer, according to Jessica Wolpaw Reyes, an economist at Amherst College, lies in the cleanup of a toxic chemical that affected nearly everyone in the United States for most of the last century. After moving out of an old townhouse in Boston when her first child was born in 2000, Reyes started looking into the effects of lead poisoning. She learned that even low levels of lead can cause brain damage that makes children less intelligent and, in some cases, more impulsive and aggressive. She also discovered that the main source of lead in the air and water had not been paint but rather leaded gasoline -- until it was phased out in the 1970s and '80s by the Clean Air Act, which took blood levels of lead for all Americans down to a fraction of what they had been."Putting the two together," she says,"it seemed that this big change in people's exposure to lead might have led to some big changes in behavior."
comments powered by Disqus
- New Information Spotlights General Dwight D. Eisenhower's Early Misgivings about First Nuclear Use
- As Islamic State group threatens its history, Iraq moves to digitize its national library
- An Old Songbook Could Put ‘Happy Birthday’ in the Public Domain
- Number of women leaders around the world has grown, but they’re still a small group
- Say goodbye to the weirdest border dispute in the world
- Robert Conquest, Historian Who Documented Soviet Horrors, Dies at 98
- Richard Rothstein says government policy created ghettos
- The Islamic historian who can explain why some states fail and others succeed
- High school senior credited with debunking book by Professor Richard Jensen
- Historians at loggerheads over the AP standards