We have so much lower hanging fruit to tackle first that doesn’t even require research: what’s the point in extending your miserable life a couple more miserable years? Adding a decade on to your life of extreme privilege is worthwhile, but for the majority of people on earth, simply getting them on to a nutritious diet would do far more for their quality of life and their lifespan than slowing down aging ever could. So much human suffering is a result of policy, not lack of scientific understanding.

Slowing down aging is like going to space: it’s a fun complicated problem for nerds to think about but it is utterly meaningless to the quality of 99% of lives on earth.