I do not agree that it should be left up to the citizen. This is why the world is overly populated right now is because the citizens have the choice. I believe if there were laws put into place that would prohibit a family from having more than 2 children and permit the lawbreakers to face fines & penalties or for those wanting more than 2 children the couple should have to apply for a permit to have another child. Depending on the population of the area at the time the couple applied for their permit, would determine weather or not their permit was granted. A judge such as an administrative judge could handle this type of decision. For some reason if the couple gets denied there should be a time frame in which they could then re-apply.