
New York City police officers
Health care, climate change, terrorism is it even possible to solve big problems? The mood in Washington is not very hopeful these days. But take a look at what has happened to one of the biggest, toughest problems facing the country 20 years ago: violent crime. For years, Americans ranked crime at or near the top of their list of urgent issues. Every politician, from alderman to President, was expected to have a crime-fighting agenda, yet many experts despaired of solutions. By 1991, the murder rate in the U.S. reached a near record 9.8 per 100,000 people. Meanwhile, criminologists began...