As of 2024, 27 states authorize the death penalty (though some have moratoria), 23 have abolished it, and the federal government retains it for certain offenses. Roughly 2,300 people are on death row nationwide. The federal government carried out 13 executions in 2020-21 (the most in any year in 70+ years), then re-imposed a moratorium.
Empirical research: Execution does not appear to have a measurable deterrent effect beyond life imprisonment. The death penalty is significantly more expensive than life-without-parole due to mandatory appeals. Innocence is documented: 200+ death-row exonerations since the 1970s.
Defenders cite retribution for the worst crimes. Critics cite irreversibility, cost, racial and geographic arbitrariness, and risk of executing innocent people.