human rights and the environment

The Environment and Human Rights (7): The Effects of Climate Change on Crime Rates

heat wave

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The relationship between environmental problems and human rights is underexamined. This is deplorable, because the most important environmental problem, namely climate change, is likely to have an adverse effect on human rights in lots of different ways.

For example, there is some data supporting the hypothesis that higher temperatures lead to an increase in crime, probably in part because high temperatures cause higher levels of aggression:

[H]igher temperatures lead to more assault and … the rise in violent crimes rose more quickly than the analogous rise in non-violent property-crime, an indicator that there is a “pure aggression” component to the rise in violent crime. …

Note that all crime increases as temperatures rise from 0 F to about 50 F. It seems reasonable to hypothesize that a lot of this pattern comes from “logistical constraints”, eg. it’s hard to steal a car when it’s covered in snow. But above 60 F, only the violent crimes continue to go up: murder, rape, and assault. The comparison between murder and manslaughter is elegantly telling, as manslaughter should be less motivated by malicious intent. …

Between 2010 and 2099, climate change will cause an additional 30,000 murders, 200,000 cases of rape, 1.4 million aggravated assaults, 2.2 million simple assaults, 400,000 robberies, 3.2 million burglaries, 3.0 million cases of larceny, and 1.3 million cases of vehicle theft in the United States. (source)

More on human rights and the environment here.

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citizenship, data, international relations, law

Migration and Human Rights (34): The “Criminal Immigrant” Stereotype, Ctd.

I presented some data debunking the criminal immigrant stereotype a few times already. It’s simply not true that immigration leads to an increase in crime rates. True, immigrants are often – but not always – relatively poor, undereducated and – initially at least – not well adjusted to their host community. But none of that seems to be a sufficient reason for higher crime rates among immigrants.

On the contrary, there’s some evidence here of immigration actually reducing crime rates:

During the 1990s, immigration reached record highs and crime rates fell more precipitously than at any time in U.S. history. And cities with the largest increases in immigration between 1990 and 2000 experienced the largest decreases in rates of homicide and robbery. … Wadsworth contends that looking at crime statistics at a single point in time can’t explain the cause of crime rates.

Using such snapshots in time, Wadsworth finds that cities with larger foreign-born and new-immigrant populations do have higher rates of violent crime. But many factors—including economic conditions—influence crime rates.

If higher rates of immigration were boosting crime rates, one would expect long-term studies to show crime rising and falling over time with the influx and exodus of immigrants. Instead, Wadsworth found the opposite. (source)

There’s yet another study here showing that Hispanic Americans are less violent than whites or blacks.

A simple juxtaposition of immigration trends and crime trends can already make clear how silly it is to claim that higher immigration rates produce higher crime rates:

foreign born share of US population

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Property crime rates in the United States, 198...

Property crime rates in the United States (1986-2005) Source: FBI Uniform Crime Reports

What could be the explanation? Why does immigration reduce crime rates? Maybe the culture and religion of the immigrants has something to do with it. Or maybe it’s true that people migrate because they want to have a better life, and that engaging in crime is incompatible with this motivation. Or perhaps the fact that immigrants tend to live in extended families and close-knit communities discourages crime.

I’ve said it before: although correlation doesn’t always equal causation, these numbers are compelling, even if we accept some possible caveats (illegal immigrants, when committing a crime, are perhaps more likely to flee abroad and hence not end up in incarceration statistics, and there may be some underreporting of crime in communities with a lot of illegal immigrants). Politicians should therefore stop exploiting irrational fears about immigrant crime for their own partisan gain. You don’t solve the crime problem by closing the border, and certainly not by ignoring overwhelming scientific evidence.

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