Well stated. 'Overpopulation' is not a realistic threat to life on the planet; unnecessarily wasting our resources and producing massive amounts of pollution is. Even still, the larger the civilization, the more likely it is to eventually collapse. In the past century, we've found ruins of gigantic societies which completely collapsed with few outside records of their existence (unfortunately, I've been unable to locate a universal database of archaeological sites around the world using a simple Google search). The more resources we waste, without working out a practical means of recycling them, the more likely we will destroy ourselves, much like those ancient gigantic societies of the past.