Can cities solve the world’s problems?

At a time when the international order is shifting, there is a growing focus on cities to help solve some of the world’s most pressing problems.
Former New York City mayor Michael Bloomberg ­­— who took steps to tackle smoking, traffic deaths and obesity during his tenure running New York — is encouraging the rise of cities as solution states through a philanthropic program called Partnership for Healthy Cities, run by Bloomberg Philanthropies.
Bloomberg contacted mayor