"Killing" is the act of attacking to death.
The feeling can also be called a "killer" model of behavior, but "killing" is more intuitive.
This behavioral model also has a reference concept, called the law of blood reward. One evaluation is that when the blood reward of a society prevails, the society is not far from collapse and destruction.
What does it look like when blood reward behavior is not prevalent? It is a reasonable and legal blood reward. Translated, it is called the death penalty according to reasonable laws.
The "kill" behavior model, and there is also a companion story called "Killer Dialogue".
Killing as an act, in general, is advocated not to be performed lightly.
The best result is to win without killing.
Recommend an anime "The Strongest Disciple in History", in which the warriors are divided into "Living Man Fist" and "Dead Man Fist" (Killing Fist), The Living Man Fist advocates not killing people easily, making people live, and the Dead Man Fist advocates killing.
