It is clear to me that to save civilisation, to save young people and those who contribute to meaningful life that the state must eradicate those that kill, steal, cheat and behave in a manner contrary to good society.
This means that the courts should routinely sentence to death those found guilty of:-
Murder
Some cases of manslaughter
Burglary
Rape
The defrauding of pensioners or old people of their savings.
The ruination of children's lives by maltreatment to the extent that they will be traumatised all their lives.
The list will be added to as necessary.
Why?
Because as the population of the planet rises to about nine million, it is an unsustainable level and can no longer support those that make a negative contribution to sustaining human life. It is true that natural life naturally adapts to having cheats in its numbers; cuckoos come to mind and parasitic wasps but this should not be used to support similar behaviour in humans.
Execution
Naturally we must have a means of execution that cannot go wrong and satisfies the victims and general public alike. I suggest the following:
A series of 5 machine guns trained on the target, secured to a chair with the chest region clearly marked. Only one of the guns is loaded with live ammunition. 5 volunteers including victims and their families' and friends can be selected and randomly allocated a gun. On the command the guns can be triggered. No one will know who is responsible for the death.