Heaven's Edge

"The art of killing cannot be our finest achievement"

I understand the struggle of Marc whose life is stuck in between his father Lee and his grandfather Eldon on war and killing. While living in a war-torn world, pacifism sounds like the way to go if we really want to save our planet for the future human civilizations. But... deep inside, I'm confused as much as Marc on when to fight for your life, when to fight for other lives by killing some others and when to run away or stay neutral doing nothing. Perhaps, we will never stop killing each other and there's no point worrying about it.