The intuition of neutrality is the view in population ethics that, roughly, adding a person to the population is in itself ethically neutral. More precisely, the view states that adding a person whose lifetime wellbeing falls within a certain positive range makes the world neither intrinsically better nor intrinsically worse (Broome 2004).
Broome, John (2000) Cost‐benefit analysis and population, The Journal of Legal Studies, vol. 29, pp. 953–970.