Original post by jamesbarry17Okay, so to the idea about existing and not-yet-existing people, I think the only successful way of disputing that is a logical a posteriori argument. My first proposition is that nothing could possibly exist if the amount of evil that has happened on the history of existence was equal to or greater than the amount of good. I find that proposition to be self-evidently true, because it seems only logical that the fundamental nature of good and evil is pro-existence and anti-existence respectively. For example, love is good because it predicates reproduction, which continues existence, whilst smashing down a building is generally a bad thing because it damages human civilisation, indirectly discouraging its existence.
Okay, so whether you would agree with that or not, I accept the proposition that although more good than evil has been done up to this point (if you accept that proposition), it is the case that more evil than good could be done in the future. For example, if you bring a baby into the world who has a genetic disorder and dies at age two, that would be more evil than good, which would be blatantly evidenced in the rapid decline human civilisation would experience if every baby born from now on suffered the same fate.
But you have to admit, in my opinion, that if every baby born from now on were to die at age two, it would be worth bringing them into the world of we were all babies who had the same genetic disorder but died at age one (and could somehow reproduce.) Babies who could live to age two amidst the same level of suffering are better than those who die at one.
So what this means is that I accept the anti-natalist viewpoint if one deduces that human flourishing is going to decline from here on in. This goes back to my original post in this chain, where I said that it makes sense from an evolutionary sense for people with relatively miserable lives to hold an anti-natalist view and not want to bring in a child who, as far as they can tell, is not going to have any better a life than them. If this theory is true, and all other variables were controlled for, then all anti-natalism would become extinct as none of them would reproduce, and all the reproducing natalists would pass on their natalism to their offspring. Over time, as we evolve more and more and our standards become higher and higher, more and more people would lose hope that the future can be better for their children than it was for them, thus adopting an anti-natalist position. Again, of course it doesn't work so simply, but that's my general theory (developed today, not much thought put into it yet) of why/how anti-natalism exists.