That urge is what I meant by "overwhelmingly archaic feelings". I hesitated to write this as I am a completely nonviolent person, but at one point, I felt the u

That urge is what I meant by "overwhelmingly archaic feelings". I hesitated to write this as I am a completely nonviolent person, but at one point, I felt the urge to take out my cheap Swiss pocket knife in preparation to kill a dog which approached the family, in case he attacked. As another commenter has mentioned, this is just something evolution has strongly selected for.