Another way to frame it is we have a developed-world population crisis. I agree that still makes "8billion+" a false alarm.
But another way to say it that if we are to lift the materialistic standard of living for the other 4 billion people, there needs to be same or less population of them.
But another way to say it that if we are to lift the materialistic standard of living for the other 4 billion people, there needs to be same or less population of them.