The state of Arizona executed Joseph R. Wood III last week. For those Americans who, as we do, consider the death penalty to be a dehumanizing punishment unworthy of our advanced society, that sentence should be enough to elicit profound moral discomfort. Then there was the way it happened: Executioners pumped Wood with a two-drug regimen meant to lull him toward death peacefully and quickly. Instead, he remained alive for nearly two hours, gasping and snorting, as his lawyer frantically appealed to a judge to call off the botched execution.

Wood’s was the third execution this year that did not go as planned. And it is not the most egregious example. That would be the April execution of Clayton Lockett by the state of Oklahoma in which prison officials improperly inserted an IV into the inmate’s arm. After the drugs failed and Lockett convulsed, clenched his teeth, attempted to speak and struggled with the gurney to which he was strapped, supervisors tried to call off the execution. Too late: Lockett finally perished after suffering a heart attack. Arizona’s two-drug procedure is different from Oklahoma’s three-drug regimen but similar to the drug combination Ohio used this year in another lengthy execution.

The death penalty in the United States is in crisis for many reasons.

We argue that the public’s increasing aversion should be based on concerns about issues deeper than just the method of killing inmates. There are a variety of practical objections: The death penalty is extremely expensive to administer; it is often applied to men with diminished mental capacity or other mental disorders. Racial disparities in death penalty sentencing and too-frequent death-row exonerations demonstrate that the criminal justice system has not applied the ultimate punishment fairly. Then there is the simple fact that this complex, costly and unattractive system is wholly unnecessary to punish even depraved criminals. Any combination of these factors points to the truth that the death penalty in the United States is deeply unwise. It is, as practiced, cruel and unusual.

Since the late 1990s, the number of executions in the United States has dropped significantly, as has the proportion of Americans who approve of the punishment. We hope these are signs of the nation’s moral maturation. As abhorrent as spectacles like the execution of Wood are, they could at least serve the purpose of accelerating that process.