Bryan Johnson , Ben Greenfield is not. Sure, both are ripped beyond their years and pushing the human body beyond their natural limits – via strict diets, early nights and the occasional blood infusion. But both are doing this for very different reasons. Johnson, this paper revealed last week , believes longevity is a necessary pursuit if we are to survive as a species – in the face of a kind of superintelligence (read: AI) we have never experienced before. Greenfield, by contrast, is perfectly happy with the idea of death: but when that happens is entirely in God's hands. His duty, he believes, is to ensure that he makes good of the life that has been ordained for him.

"For your soul to be able to bless other people, and for you to be able to live with maximum impact doing whatever it

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