Humans killing ourselves &#x2F; extinction events are incredibly unlikely over the time frame that SpaceX will exist for. They&#x27;re also easier to survive or avoid than it would be to colonize Mars. Except maybe surviving a gamma ray burst -- but who knows, since it looks pretty impossible for humans to colonize a planet.<p>On the other hand we have a chance to save the tens of billions of people who will live and die in the 21st century and experience genocide, starvation, disease, child abuse, imprisonment, other violence, etc. We&#x27;re already doing it -- it&#x27;s achievable. It can&#x27;t wait for a Mars colony!