There is something to be said for the renewal of humanity and its cultures that comes from mortality. I try to imagine the views of someone who was five hundred years old, and compare them with the views of someone just graduating high school. Think about it.

For every person that would have enhanced humanity by going on for many lifetimes, there are probably twenty that would have done the opposite.

And if humanity is given the choice between living forever and not having children--which is the choice that eventually must be made, barring star gates--it's unsettling to think what that choice might be.

It would be interesting to poll people on this subject, and compare the responses of those with children, and those without.

In the meantime, think about this:

In only 150 years, every single human being now on the planet Earth will be dead. Whoa.