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Executions Don’t Deter Murder, Despite the Trump Administration’s Push

protesters outside U.S. Penitentiary in Terre Haute site of federal and military executions

Three more federal inmates are slated to be executed before the end of President Donald Trump’s term, though the first received a temporary stay hours before she was slated to die on Jan. 12, before the Supreme Court cleared the way for the execution to go ahead on the 13th. Ten have already been put to death since the Trump administration announced in July 2019 that it would resume executions after a 17-year suspension.

It’s not clear why the administration has done so many in such a short time after a long break. Officially it claims to be “bringing justice to victims of the most horrific crimes.”

Capital punishment has a long history, which may even extend to prehistoric times when early humans sought ways to rid their communities of incorrigible troublemakers.


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In modern times, governments use what German social theorist Max Weber called their “monopoly on legitimate force” to conduct executions. From my decades as a psychologist and biologist, I identify four basic justifications governments use for killing their citizens:

Death penalty advocates most frequently focus on deterrence – but as research including my own work shows, it has not been shown to be effective.

drawing of Tyburn execution site from medieval England
A depiction of Tyburn execution site from medieval England. Source Project Britain

A Brief History

By the end of the 18th century, England specified 220 different offences – mostly thefts of different kinds of property – that were punishable by death. The expressed intent of England’s “Bloody Code” was deterrence.

“Men are not hanged for stealing horses,” wrote the Marquess of Halifax, a 17th-century British nobleman, “but that horses may not be stolen.” Nevertheless, horses were stolen, and poor people were hanged for stealing them – or a quill pen or a bolt of cloth.

The idea of deterrence lasted another couple hundred years: In the 1970s, economist Isaac Ehrlich claimed that every execution saved eight innocent lives by preventing other murders. His hugely influential work has subsequently been challenged, not least because it relied on national trends and did not distinguish between crimes in states that had, or lacked capital punishment.

In 2020, the U.S. government still has the death penalty on the books for certain crimes, as do 30 states. These laws face ethical and logical criticism, such as the idea of a government killing people to reinforce the idea that people shouldn’t kill people. They also are often found to be unjust, sometimes executing innocent people and used disproportionately in cases involving racial minorities and poor people. But most importantly, and, despite what its advocates say, capital punishment doesn’t deter murders.

An aerial view of the execution building at the U.S. Penitentiary in Terre Haute, Indiana
Federal executions happen inside this building at the U.S. Penitentiary in Terre Haute, Indiana. AP Photo/Michael Conroy

Research and Evidence

Research has shown that, while there have been changes in murder rates over time, those changes aren’t related to whether a government has – or doesn’t have – the death penalty. By far the most authoritative report to date came from the National Research Council, an arm of the National Academy of Sciences, in 2012. It found there was no credible evidence that capital punishment has any effect on homicide rates.

Of course, there is no ethical way to devise a scientific experiment to test whether capital punishment deters murder. But an impressive array of correlations exists, which together are enough to make a highly credible, informed judgment. For example:

It is tempting to think that severe penalties would effectively reduce crime, with the most extreme penalty – death – reducing the most serious crime, notably murder. But there is simply no compelling evidence that it does.

Author: David P. Barash, Professor Emeritus of Psychology, University of Washington

This article is republished from The Conversation under a Creative Commons license. Read the original article. The article has been updated to reflect that Lisa Montgomerie was executed on the Jan 13th

The Conversation

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