New members of society add value. They will do a lifetime worth of work. New members of society have a cost. They will use a lifetime worth of services. On aver

New members of society add value. They will do a lifetime worth of work. New members of society have a cost. They will use a lifetime worth of services. On average, those will be about the same. There is probably an ideal population count, but without actually figuring out what that count is and showing we're below it, that's not a worthwhile discussion.