Over the past few years when crime statistics have come out, they
have generally been lower than the year before. It's a curious trend. Why as the world gains population,
cities grow more crowded and the income gap grows, even during the worldwide
economic collapse a few years ago, do crime statistics show a downward trend?
It's a curious situation to which no one has been able to find an answer. The
trend defies the general understanding. By all counts the rate of crime should
be increasing.
R. Nevin via the BBC |
Now someone has come along with a surprisingly plausible explanation. Researchers on both sides of the
Atlantic Ocean have made a logical connection between lead in gasoline and
crime. According to their research, 20 years after lead was first added to
gasoline, crime increased at a comparative rate. Then, 20 years after producers
removed lead from gasoline in the 1970s, the crime rate worldwide began
dropping accordingly.
Lead has been blamed for many maladies in humans, and the researchers
point to the fact that lead in the atmosphere reduces a brain's gray matter
with resultant effects on behaviors such as impulse control. According to their
logic those effects lead to more crimes. Other scientists disagree with that
theory, questioning whether biology can be linked to crime.
Still, the research shows a remarkable parallel between the
addition and reduction of lead in gasoline and crime and perhaps suggests at least part of the
reason why against social odds, the rate of crime keeps dropping.
Here's the full story from the BBC
Here's the full story from the BBC