Illinois became the 16th state to ban capital punishment as Gov. Pat Quinn on Wednesday signed an abolition bill that the state legislature passed in January.
“Since our experience has shown that there is no way to design a perfect death penalty system, free from the numerous flaws that can lead to wrongful convictions or discriminatory treatment, I have concluded that the proper course of action is to abolish it,” Mr. Quinn said in a statement.
I support the Illinois decision, although my justification would be somewhat different.
Any system of punishment makes mistakes; this fact, by itself, does not determine value of the death penalty.
But decades of social science research has failed to uncover a convincing impact of the death penalty in deterring crime. So, if capital punishment does not generate its main desired outcome, and it raises the costs of any mistakes made by the criminal justice system, then the case for this approach is weak.
In addition, capital punishment may increase criminal justice expenditure because of the endless appeals in death penalty cases. Incarcerating someone for life is also costly, so the net difference is not obvious. But any budgetary benefit of the death penalty is probably modest and might even be negative.