I have discussed on various occasions the possibility of human immortality with people. Most of the time people thought it would be a bad idea without giving specific reasons but relying on their feelings.
Are there logical (in whatever ethical system) reasons to be opposed to immortality? (Meaning humans would be worse off as a whole than before the invention.)
The only thing that comes to my mind is things wouldn't change, but the good thing about living things is that they can change without dying.
Especially I don't see how in any theoretical case immortality could be bad. Let's imaging a good life where you die. An immortal life can be exactly like that life you imagined, perfect and then you die. So the option of immortality seems to me to be no hindrance and always a good option. My question boils down to: Why would people be opposed to a mere option of immortality? How could a voluntary option of any kind be a bad thing?