Anti-natalism

The philosophical position that it is morally wrong to bring new persons into existence, typically because life involves more suffering than benefit or because consent cannot be obtained from potential persons.

David Benatar's asymmetry argument: the absence of pain is good even if there is no one to enjoy that absence; the absence of pleasure is not bad unless there is someone for whom the absence is a deprivation — therefore non-existence is always preferable to existence.