Communities are essential building blocks of society. The communities to which we belong, by circumstance or by choice, define both who we are and who we are not. In recent times, major shifts in the concept of community have forced us to question our long-held notions of identity and examine how it shapes our worldview. Join WNYC’s John Schaefer and a group of leading thinkers for a lively discussion of the origins of community and its rapid evolution in the 21st century.