Plotting to destroy the planet is a good source of conflict for your standard Evil Overlord, but, when it comes right down to it, destroying the world isn't really a very effective Evil Plan -- especially if it's the world the Evil Overlord is living on: it's where he keeps his stuff. Basically, plotting to destroy the planet is a good way to demonstrate that you're evil, but there are hardly any situations in which this sort of destruction is going to have any sort of value for the villain. Examples of Mike Nelson, Destroyer of Worlds include: