Capital Punishment

Many distinctive doctrines in criminal law originated in efforts to restrict the number of capital crimes and executions. For instance, in the late 18th century, when all murder in the United States was punishable by death, Pennsylvania pioneered in dividing murder into two categories. The state enacted laws that authorized punishment of first-degree murder by death, while second-degree murder was punishable by imprisonment only. Elsewhere, penal codes uniformly required death for certain serious crimes. In these jurisdictions, discretionary powers to commute death sentences gradually expanded. (A commutation substitutes a lesser penalty for a more severe one—for example, replacing execution with a life sentence.) Today in many nations, including Turkey and Japan, the death penalty remains legal but the number of executions has declined over time.

Although many jurisdictions limited imposition of the death penalty, no government had formally abolished capital punishment until Michigan did so in 1846. Within 20 years Venezuela (1863) and Portugal (1867) had formally eliminated the practice as well. By the beginning of the 20th century the death sentence had been abolished in a handful of nations, such as Colombia, Costa Rica, Ecuador,