And let them organize their civilized society enough to the point where they arrange to cook and eat me, explaining to me as I am grilled on the barbie that human rights aren’t real because the only species with established civilized rights is theirs? Eat first and ask questions later
Did he upgrade the head and handle? If so, it’s still your grandpa’s axe. Did you upgrade the axe? It might now be an axe of your own making. If “same” is extended not just to refer to the materials, but refers to fourth-dimensional quantum axe states, the axe stops being your grandpas axe the moment your grandpa isn’t chopping with it, but becomes his axe any time he returns to use it.