I missed this when it was first written—probably because it was only a week after Donald Trump won the election—but Robert Waldmann decided to check out a few of his predictions:
In April 2008, I predicted that the UK violent crime rate would peak some time around 2008. I just googled and found that it peaked in around 2006 or 2007.
Here’s the chart, courtesy of the Institute for Economics and Peace:
Note two things here. First, Britain’s violent crime rate peaked about 15 years after it did in the US. Second, it dropped a lot faster than it did in the US. Why?
Because, first, Britain adopted unleaded gasoline about 13 years after the US (1988 vs. 1975). And second, because it phased out leaded gasoline a lot faster than the US. Within four years Britain had cut lead emissions by two-thirds, which means there was a very sharp break between infants born in high-lead and low-lead environments. Likewise, this means there was a sharp break between 18-year-olds with and without brain damage. In 2006, nearly all 18-year-olds had grown up with lead poisoned brains. By 2010, that had dropped substantially, which accounts for the stunning 40 percent drop in violent crime in such a short time.1
This is one of the reasons the lead-crime hypothesis is so persuasive. Not only does recorded crime fit the predictions of the theory—both in timing and slope—but it does so in many different countries. What other theory would predict a gradual drop in violent crime between 1991-2010 in the US and a sharp decline in violent crime between 2006-10 in Britain? Especially considering that the US and Britain have entirely different policing, poverty rates, race issues, etc.?
Anyway, I might as well take this opportunity to repeat my prediction that terrorism in the Middle East will begin to decline between 2020-30. You heard it here first.
1And it continued dropping for several years after that. There was a big increase last year, but it was almost entirely driven by changes in measurement, not changes in the actual crime rate.