The safest lives in history are lived today by people on Level 4. Most preventable risks have been eliminated. Still, many walk around feeling worried. They worry about all kinds of dangers “out there.” Natural disasters kill so many people, diseases spread, and airplanes crash. They all happen all the time out there, beyond the horizon. It’s a bit strange, isn’t it? Such terrifying things rarely happen “here,” in this safe place where we live. But out there, they seem to happen every day.

— Factfulness by Hans Rosling, Ola Rosling, Anna Rosling Rönnlund