The death penalty targets people with mental illnesses or intellectual disabilities.

The argument

There is considerable evidence that the death penalty unfairly affects people with mental illnesses or intellectual disabilities. According to Mental Health America, it is estimated that 20 percent of death row prisoners suffer from a serious mental illness — a share far out of proportion to the population those sentences are drawn from, which is what makes the pattern look like selection rather than coincidence. Before the Supreme Court banned such executions, at least forty-four people with intellectual disabilities were executed in the United States. The moral objection follows from what culpability requires. It is unfair to consider people with intellectual disabilities or mental illnesses as culpable for their actions because they often suffer from psychosis or do not realize what they are doing while committing a crime. A punishment justified by an offender's full responsibility for a deliberate act cannot be justly imposed where that responsibility is precisely what is in doubt — and the death penalty is the one punishment that leaves no room to revisit the judgment afterwards. The safeguards that exist do not reliably catch these cases. Although the U.S. Supreme Court has stated that mental illness should be a serious consideration in death penalty proceedings, it is often difficult to prove that a person's mental illness seriously impacts their decision-making abilities. In some states, an individual is required to have a medically documented history of mental illness if they are to avoid the death penalty — a requirement that turns on whether a defendant had prior access to diagnosis and treatment, which is exactly what the poorest and most severely unwell defendants are least likely to have had. As a result, mentally ill prisoners face a high risk of receiving death sentences. Because the protection is conditional on a record that many of the people it is meant to protect will never possess, the failure cannot be corrected from inside the process. For this reason, we should abolish the death penalty.

Premises

Counter-arguments

The execution of a person with a mental illness or intellectual disability is wrong, but this does not necessarily imply that we should abolish capital punishment. The death penalty's misuse reflects fault in our criminal justice system, not in the punishment itself. The death penalty's weaponization toward vulnerable communities is tragic. We must protect these demographics from wrongful execution, but retain the death penalty for those who truly deserve it.

Rejecting the premises

[Rejecting P1] The figures show over-representation, not targeting. Serious mental illness is more prevalent throughout the incarcerated population than in the general one, so the death-row share needs comparison with the wider prison population before it can indicate anything specific to capital sentencing. The executions of people with intellectual disabilities also predate the ruling that prohibited them, which is evidence of a system correcting itself rather than of one that selects such defendants. [Rejecting P2] The culpability point concerns who may be executed, not whether anyone may be. Both the case law and the argument itself accept degrees of responsibility, and that framework already excludes categories of defendant, so the premise supports narrowing eligibility rather than abolition. [Rejecting P3] The evidentiary difficulty is a claim about procedure — how impairment is established, what counsel and expert assessment a defendant receives, what documentation a state requires — and the remedies for it are procedural. The counter puts the objection directly: a defect in administration argues for repairing the administration, and the argument would need the further claim, which it does not make, that the defect cannot be repaired.