Throughout history, cities have been the engines of the most vibrant and successful societies: attracting human capital, serving as hubs for trade and commerce, evolving as centers for advancing research, innovation, and technology. Today, cities are at the forefront of global efforts to fight global warming, advance sustainability, and improve health, livability, and economic opportunities. How are governments rethinking how cities are positioned to welcome global businesses, capital, and talent? How are government leaders working with the private sector to ensure their cities thrive and are successful, even in an era of climate change, migration, and geopolitical uncertainty?