but after thousands of studies, the evidence is irrefutable: if you believe climate change is a threat, you can't say that GMOs are, because the evid… - David A. Sinclair

This might be the least considered societal advantage of prolonged vitality, and it might just be the greatest advantage of all. Perhaps when we're not all so afraid of the ticking clock, we'll slow down, we'll take a breath, we'll be stoic Samaritans.
I would like to emphasize the word "perhaps," here. I will be the first to say that this thesis is supposition more than science. But the small-sample Princeton experiment both followed and portended a lot of other research demonstrating that humans are a lot more humane when they've got more time. All of the studies, though, take stock of how people behave when they have a few more minutes, or perhaps a few more hours, to spare.
What would happen if we had a few more years? A few more decades? A few more centuries?

Every one of our cells has the same DNA, of course, so what differentiates a nerve cell from a skin cell is the epigenome, the collective term for the control systems and cellular structures that tell the cell which genes should be turned on and which should remain off. And this, far more than our genes, is what actually controls much of our lives.

I believe that aging is a disease. I believe it is treatable. I believe we can treat it within our lifetimes. And in doing so, I believe, everything we know about human health will be fundamentally changed.