Evil sows the seeds of its own destruction. At least that's what every Aesop and fortune cookie says, anyway. There seems to be some truth to it, though, at least in fiction, because regardless of Genre Savvy, villains tend to inherently draw the kind of heroic attention to themselves that leads to their demise, or at least the demise of their Evil Plan. Basically, they're saddled with carrying their own version of the Idiot Ball: the Villain Ball. Inevitably, it's their own inherent Fatal Flaws that lead to their downfall, possibly even an apropos Karmic Death or Cool and Unusual Punishment.