“Scientists, while very intelligent, don't always think things through. Take, for example, the first caveman who found a nice rock, tied it to a stick with a piece of vine, and thought, 'Hmm, I've just invented a Thing for Banging Other Things into Things With. I feel certain that nobody will use this to hit someone over the head with instead.' Which someone promptly did. In fact, they probably hit him with it so that they could steal it. This is how we end up with nuclear weapons, and scientists claiming that they'd only set out to invent something that steamed radishes.”