Seed: Why We Haven't Met Any Aliens: "[A]liens don't blow themselves up; they just get addicted to computer games. They forget to send radio signals or colonize space because they're too busy with runaway consumerism and virtual-reality narcissism. They don't need Sentinels to enslave them in a Matrix; they do it to themselves, just as we are doing today."
Geoffrey Miller's article in the current issue of Seed is one of the most interesting (if bleak) articles I've read in long time. Thought-provoking stuff.