>It is literally unnatural to deliberately choose to not have children Something's being natural or unnatural has no bearing on whether it is right or wrong. I

>It is literally unnatural to deliberately choose to not have children Something's being natural or unnatural has no bearing on whether it is right or wrong. I assume that when the OP says "we can no longer justify" they are making a moral claim, which means that saying it's "unnatural" to not reproduce is failing to be relevant.