Big Bang theory tells us how finely tuned the laws of nature need to be for stars, planets, and life to arise. Even tiny deviations and we would not exist. Most people don’t respond to that observation by saying “Wow, we were lucky!”—or by wondering whether billions of Big Bangs generated billions of parallel universes, a few of which turned out by chance to be life friendly. Some physicists think this way. But most of us suspect that something—perhaps God—was behind it. It was meant to be.
