Humans are naturally optimistic. Which helps explain religion.
Most people's brains are hard-wired to generate an optimistic outlook on life. Evolution, it seems, has favored an ability to look into the future and see good things happening. Such is the message of TIME magazine's cover story this week, "The Optimism Bias." It's a highly interesting article. Tali Sharot, the author, says that "optimism starts with what may be the most extraordinary of human talents: mental time travel, the ability to move back and forth through time and space in one's mind." This ability was naturally selected for in the course of Homo sapiens ' evolution because it had so many survival advantages, such as planning ahead for a future reward. However, mental time travel comes with a big downside. While mental time travel has clear survival advantages, conscious foresight came to humans at an enormous price the understanding that somewhere in the future, death awaits. Ajit Varki, a biologist at the University of California...