The great social scientist Stephen Pinker has observed a long-term secular decline in violence, despite the relentless media attention given to killings at home and abroad. Domestically, our state and local governments can drive down the number of murders and assaults even more, if they will take further advantage of technology and strengthen the adherence to the rule of law. We need to continue to innovate but also protect our greatest legal inheritance.
Technology has already contributed significantly to the decline in violence in our cities. CompStat, a management system for police developed in New York City, deploys police officers at the optimal places and times to cut down on crime. This largely computerized service is now used by police departments around the country. And it will improve with ever better data and algorithms.
Surveillance cameras in public spaces not only help solve crimes but also help deter them because people know they are being watched.