Anti-lock brakes make many motorists drive faster. Introducing helmets and face masks in football raised the risk of concussions. Financial regulators and central bankers played a role in creating conditions that led to the 2008 mortgage meltdown.

The illusion of safety can lead to reckless behavior. These fascinating insights are part of "Foolproof- Why Safety Can Be Dangerous and How Danger Makes Us Safe", the recently published book by Greg Ip, chief economics commentator at The Wall Street Journal.