 not eating poisonous berries than to really savoring the good ones. You had to pay more attention to predatory lions. If you miss out on a great opportunity for good food or sex or any other life-affirming thing, well, okay, that's too bad, but you might have another one the following day. But if you miss out on a dangerous predator, fail to notice, that will put an end to your life. And so part of the psychological mechanism underlying our work is that