|Get yours at|
To get the definition out of the way up front, by "state" I am not talking about any particular political subdivision. The "state" is the institution with the monopoly on legitimate coercion. When a soldier kills, for example, it is not "murder" because he is acting as an agent of the state. What is robbery if I do it is "tax collection" when performed by an agent of the state. And so on. The act that is otherwise criminal is declared to be legitimate specifically because an agent of the state is doing it. They are "only following orders".