Whether the death penalty should be allowed is one of the oldest unresolved questions in American law, and the country has not reached consensus: 27 states and the federal government currently authorize capital punishment, while 23 states have abolished it. The honest answer is that the case for or against depends on how you weigh four things against each other: the moral weight of the worst crimes, the documented risk of executing innocent people, the uneven way sentences are handed down, and whether executions actually prevent future killings. Roughly 2,000 people sit on death row today, and after years of decline, executions have picked up again. By mid-2025, 27 people had been put to death, more than in all of 2024.
President Trump reversed the Biden-era moratorium on federal executions by executive order in January 2025, directing the Attorney General to pursue death sentences in cases involving the murder of law enforcement officers, crimes against children, and acts of terrorism, among others.1The White House. Restoring The Death Penalty And Protecting Public Safety Before leaving office, President Biden had commuted 37 of the 40 federal death sentences then in place. So the question is live again, both as policy and as practice.
The Case for Allowing It
The strongest argument for capital punishment is retributive. Some crimes are so extreme, supporters say, that only the offender’s life answers for what was taken. Under this view, executing a murderer affirms the value of the victim’s life in a way no prison sentence can. The argument carries particular force in cases involving the killing of children, mass murder, or terrorism. Proponents also lean on a social-contract logic: a person who commits the most extreme violation of communal norms has forfeited the protections that contract provides.
There is also an intuitive deterrence claim. People fear death more than prison, the argument goes, so the threat of execution should give at least some would-be killers pause. Supporters acknowledge the empirical picture is messy but say common sense counts for something when the stakes are this high.
A narrower practical argument: for a defendant already serving life, or who kills again in prison, the death penalty is the only sanction left that carries real weight. Without it, the system has nothing further to threaten.
The constitutional ground for all of this is settled. The Supreme Court halted executions in 1972 in Furman v. Georgia, finding that death sentences were being handed down arbitrarily,2Justia U.S. Supreme Court Center. Furman v. Georgia, 408 U.S. 238 then allowed them to resume four years later in Gregg v. Georgia once states adopted guided-discretion statutes with separate guilt and sentencing phases.3Justia U.S. Supreme Court Center. Gregg v. Georgia, 428 U.S. 153 Capital punishment, carried out under the right procedures, does not violate the Eighth Amendment’s bar on cruel and unusual punishments.4Congress.gov. U.S. Constitution – Eighth Amendment
The Case Against Allowing It
The strongest argument against capital punishment is that the system makes mistakes, and this punishment cannot be undone. Since 1973, at least 202 people sentenced to death in the United States have been exonerated. That works out to roughly one exoneration for every eight executions carried out. The most common causes are official misconduct and perjury or false accusation.
A person serving a life sentence who is later proven innocent can be released. A person who has been executed cannot. Supporters of the death penalty respond that modern forensic tools, especially DNA testing, have made wrongful convictions less likely, and that the exoneration figures themselves show the system catching errors before an execution occurs. But DNA is available in only a fraction of murder cases, and many exonerations came through investigative journalism, outside advocacy, or luck rather than any built-in safeguard. The 202 figure also counts only full exonerations. It does not include cases where serious doubts emerged after an execution had already happened.
There is also a moral argument that stands apart from the error question. A government committed to human rights, opponents say, undermines its own authority by deliberately killing its citizens, even those who have done terrible things. Many religious and philosophical traditions hold that every person retains inherent dignity regardless of their actions, and that no institution should have the power to extinguish it on purpose. More than 140 countries have abolished the death penalty in law or practice, and the United States has been the only country in the Americas to carry out executions in recent years. Retentionists view that comparison as beside the point: each country decides its own approach to justice.
Does It Actually Deter Crime?
Deterrence is the empirical pivot of the debate, and the evidence does not clearly support either side. The National Research Council reviewed the research in 2012 and concluded that existing studies “should not influence judgments about the effect of the death penalty on homicide rates” because they were fundamentally unreliable.5National Academies Press. Deterrence and the Death Penalty
The problem is statistical. The death penalty is imposed rarely, murder rates respond to a long list of factors, and separating any deterrent signal from the background noise is close to impossible with the data available. Some studies have claimed each execution prevents between 5 and 18 murders. Other researchers, using the same data with small methodological changes, found no deterrent effect at all. The NRC panel found the results so fragile that minor, defensible adjustments to the analysis flipped the conclusions.
This does not prove the death penalty has no deterrent effect. It means we don’t know, and probably can’t know from the data we have. Critics add a behavioral point: most murders happen in moments of rage, under the influence of substances, or by people who don’t expect to be caught. None of those are situations in which a calm cost-benefit calculation is happening in the offender’s head.
Who Gets Sentenced to Death
Even people who accept the death penalty in principle have to reckon with how unevenly it is applied in practice. The race of the victim is a strong predictor of who ends up on death row. More than 75% of defendants who have been executed were sentenced for killing white victims, even though roughly half of all homicide victims in the United States are Black. A 1990 U.S. General Accounting Office review found that 82% of the studies it examined showed the race of the victim influenced the likelihood of a capital charge or death sentence.
Geography matters almost as much. A small number of counties produce a wildly disproportionate share of death sentences. Whether a defendant faces execution often depends less on the facts of the crime than on which prosecutor’s office handles the case. Supporters argue this is an implementation problem that calls for better guidelines, not abolition. Opponents say the disparities are built into any system that gives prosecutors broad discretion, and point back to the arbitrariness concern that drove Furman in the first place.
What It Costs
Pursuing a death sentence costs taxpayers substantially more than seeking life imprisonment without parole. The added expense shows up at every stage. Capital defendants are entitled to at least two court-appointed attorneys when they cannot afford counsel. Pre-trial preparation requires expert witnesses on forensic evidence, mental health, and the defendant’s background. Jury selection takes far longer because prospective jurors have to be individually questioned about their views on execution. Capital trials run about four times longer than comparable non-capital murder trials.
After conviction, the bill keeps growing. Death row inmates are housed in specialized high-security units, often in solitary confinement. Every death sentence triggers a lengthy appeals process, which is a constitutionally necessary safeguard given the irreversibility of the punishment. The federal judiciary requested $1.77 billion for defender services in fiscal year 2026, with $12 million specifically earmarked for the capital caseload created by the new federal death penalty directives.
There is a quieter cost on top of that. Most cases in which prosecutors seek the death penalty do not end with a death sentence, and among those that do, the most common eventual outcome is reversal on appeal. Those defendants end up serving what amounts to a life sentence anyway, but at an inflated cost because of the capital proceedings that came first.
What the Alternative Looks Like
The practical alternative in every state is life imprisonment without the possibility of parole. It removes the offender from society permanently. It costs less. It is reversible if a conviction turns out to be wrong. Supporters of the death penalty say life without parole is not morally equivalent to execution for the worst crimes, that proportionality demands more. Opponents say permanent incapacitation achieves the same protective purpose without requiring the state to kill anyone, and without foreclosing correction when the system makes a mistake.
Two limits on who can be executed are worth noting here, because they shape what the alternative actually covers. The Supreme Court has held that people with intellectual disabilities cannot be executed,6Justia U.S. Supreme Court Center. Atkins v. Virginia, 536 U.S. 304 and that no one who was under 18 at the time of the crime can be sentenced to death.7Justia U.S. Supreme Court Center. Roper v. Simmons, 543 U.S. 551 Those categories already get life sentences or lesser punishments in capital-eligible cases, regardless of what any legislature decides about the death penalty generally.
Where This Leaves the Question
The country’s split on this question tracks the trade-off itself. If you believe some crimes are extreme enough that only the offender’s life answers for them, and that the system can be administered fairly enough to justify a permanent punishment, the death penalty has a defensible place in the justice system. If you believe the documented wrongful convictions, the racial and geographic disparities, the lack of clear deterrent effect, and the higher cost mean the system cannot be trusted with something it cannot take back, abolition follows. Twenty-seven states have landed on one side of that trade-off and 23 on the other, and the arguments laid out above are why neither side has been able to end the debate.