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.

It's definitely fascinating, feeling these outdated instincts in our modern world.

you can made a copy of your code and put it inside a tiny human body. of course, you will defend it with your life! it is what will carry you..or rather a tiny sliver of you into immortality. it's precious because you will die one day but part of your code won't....your child will continue on and hopefully will reproduce to take forward a part of you and so on. we are all meat sacs carrying the code of life.