This document discusses how cities can mobilize creativity and knowledge to tackle social challenges. It argues that while cities are centers of culture and innovation, they also face major issues like inequality, poverty, and environmental degradation. The document introduces the concept of an "Urban Ideas Bakery," which uses methods to help cities harness their creativity to better address problems in areas such as education, crime, and sustainability. It aims to go beyond traditional views of urban creativity in arts and culture to stimulate social innovation that can tackle compelling social issues.