Longtermism doesn’t have to do with one’s own personal genetics or lineage, though, and it certainly doesn’t belong to Elon.

Longtermism is a notion coming out of population ethics, that since there will be more people in the future than there are today, that we should take the well-being of all those future people into account when making decisions today.

This can be taken in lots of different directions — ranging from humanist environmentalism, to space migration, to concern about exotic existential risks.

But a fixation on one’s own personal DNA is not really related to it at all. That’s more of a misunderstanding of evolutionary biology.