Safety is something that many of us take for granted in a first-world country. Unlike our ancestors, even the poorest of us generally have access to food, water, and shelter. Most of us wake up in the morning, go to work, mow our lawns, go shopping, without ever once feeling unsafe. When something does happen to us, it's a shock.
A coworker of mine recently experienced a break-in. It was a kid who knew the family, and thought he could get away with ripping off a few cell phones. He confessed to his misdeeds, and the family now knows who it is and what led up to the break-in, but he still said that they couldn't sleep well at night, knowing how easily their safety could be shattered.