Is Parenthood Just Permissible? (part 2)

Marc Quinn - www.marcquinn.com
Some say we have a prima facie obligation to procreate (like Saul Smilansky), but common sense these days says procreation is just permissible.  Yes, yes, there are population worries, but let's set those aside, please.  Not because they aren't pressing and serious, but because they're not relevant to the philosophical questions I'm trying to think about here.