Because we do have hope for a Better World. We did not even have Flush Toilets 100 years ago. There is hope.....

I don't have children or want any.

"Should"?????????? Not the correct question, methinks, especially in light of the extreme overpopulation & results of it the world is experiencing.

To keep existence existent. Like the old if a tree falls in the woods with no one to hear it , does it make a sound question. We did spring forth from other happenings but they would cease to be without consciousness... one could argue.

brining children into a world that is potentially dying, filled with pain, suffering and constant work whilst simultaneously knowing they'll probably never be truly happy for any length of time, is in short something of a crime for a higher thinking being.