City Life is about urban people and their work.  What happens when at least a thousand people come together in an area to form a place of trade and accommodation?  Think about more than 8 million people coming together in New York City!   A lot happens: buildings, cuisine, music, dance, photography, cinema: people living, loving, and working.  Cities are centers of culture, architecture, employment, social change, tourism, and environmental concern and innovation.  What is it about urban environments that promote open, positive and creative attitudes, and yet can burden with negative and stifling complexities?  Cities are about special advantages, special group identities, and special problems.