 A related proposal that avoids the difficulties of tethering non-comparative harm to any particular list of adverse conditions makes use of the concept of a threshold-dependent concept of harm (Rivera-Lopez 2009, 342; see also Meyer, 2004). On this view, bringing a child into existence whose wellbeing level falls below “some normal threshold of quality of life” counts as harming that child even if that existence is itself worth having (Rivera-Lopez 2009, 337). 