Amnesty International and Human Rights Watch are two prominent organisations fighting against death penalty.
The issues involved in the discussion of death penalty usually focus around two main parts.
The choice of a particular method in Europe in the Middle Age, for instance, depended on the social status of the condemned.
Painless and respectable ways were reserved for the aristocracy; and more painful for the common people, such as hanging or breaking on the wheel.
Some nations including China, the US, Iran, Belarus, and others preserve the death penalty as an option, while others like Canada, Australia, New Zealand, and almost all European nations have abolished capital punishment.
Still others keep the norm in their legislations, but have de facto suspended execution of criminals sentenced to capital punishment.
Political crimes should not be punished with death either, as this would open the way to political repression and physical elimination of political rivals, as it happened in Stalin's times in the Soviet Union.
However, when a person murders another person, death is the right kind of retribution.
Background The history of death penalty is almost as old as the history of mankind.
Various means of capital punishment involved burning, hanging, drowning, crucifixion, breaking on the will, boiling to death, electrocution, firing squad, gassing - the list can be continued.