"Non-living matter, being purely objective, is oblivious to the subjective phenomena that torment living creatures, that is, free from any and all suffering, in a state of perfect serenity. It does not makes sense to try to be "mean" with inanimate matter. There is no way to torture rocks by throwing them off cliffs, hammering them, etc. There is only one way to make matter suffer: by transforming it into a living being. It follows that, even from an objective point of view, we can find moral implications in reproduction, since it condemns matter to suffer needlessly in the form of a living being driven by afflictions and needs, only to later return to the same situation in which it initially found itself, without any meaning or benefit to it. From this perspective, we do not claim that reproduction is wrong, only that it is cruel. We affirm that, objectively, to live is to suffer. However, we do not draw subjective conclusions from this. Whether or not it is worth living is a different and subjective question, which refers to the value we attach to life. The immorality lies in the fact that the value of life is an issue that can only be considered by those who are already alive. When we reproduce, we impose our personal conclusions on someone who cannot even defend himself. Naturally, it is not a transcendental and absolute morality, but one relative to life. It can be understood as objective in the sense of referring to something that necessarily occurs, due to the very nature of life, due to the conditions imposed on subjective existence when inserted in the determinations of the objective world. Therefore, let us not confuse this observation with moral preaching about right and wrong, right and duty, etc. We are only concerned with objectively describing the physical consequences of the equally physical phenomenon of bringing into existence a new consciousness that will be haunted by the restlessness that moves life."
January 1, 1970
https://en.wikiquote.org/wiki/Antinatalism