I'm in favor of research into life extension. But I don't think this response really deals with the fundamental objection of: "Change is necessary Death creates change Therefore, death is necessary" Perhaps humans are not very capable of change once we reach adulthood and so significantly (or indefinitely) extending human lifespan would result in civilizational stasis. I don't see a simple way to overcome this argume…
There is a logical flaw in that syllogism: Just because death creates change doesn't mean that death is the only thing that creates change. And if you can substitute some other process to create change, then death is not necessary. It's like this syllogism: 1. We must do something about unemployment. 2. Slavery is something. 3. Therefore, we must do slavery. Once the syllogism falls apart, it's obvious that there are…
It's not so much that I buy this argument...it's that I don't see a simple way to rebut it. To me, it's an empirical question that we can't answer a priori, i.e. "what would human civilization look like if everyone lived forever?"