A species only lasts for a million years or so. Do you feel that way, independently of the people who are going to inherit that earth right the next forty thousand generations? Well, we know it. You mean our descendants, somehow, beings that descended as a result of cause and effect in a chain of which we are the beginnings now,. They might be machines. I doubt that ause ive. Let or rats go there. No, let's i have there. I suppose they are machines. It's suppose we create some artificial intelligence in a box that dis it, expands and destroys all humanity to feed itself - would that make you happy? Sad. Irrelevant.