I would say the right and the concept of such rights is necessary for a society-species as specialized as ours to continue. We depend upon each other for our very survival. Most of us wouldn't do as well out on our own: we have no fangs, no claws, and very little fur.
To disregard each other's right to live would mean degenerating back into an uncivilized species that is not mutually inter-dependent but in which each individual is a self-sufficient island. Which does nothing to further the species' success, so the opposite happens: we as a group attempt to weed out the aberrants that show such disregard for the group.
To disregard each other's right to live would mean degenerating back into an uncivilized species that is not mutually inter-dependent but in which each individual is a self-sufficient island. Which does nothing to further the species' success, so the opposite happens: we as a group attempt to weed out the aberrants that show such disregard for the group.