Status Updates From Pirómides (Discworld, #7)

"If it's true that there are billions of universes stacked alongside one another, the thickness of a thought apart, then there must be people elsewhere. But wherever they are, no matter how mightily they try, no matter how magnificent the effort, they surely can't manage to be as godawfully stupid as us. I mean, we work at it. We were given a spark of it to start with, but... we've really improved on it."