The document discusses how post-war culture and economics are ending as cities grow faster than suburbs for the first time in 100 years. It argues that a third industrial revolution is beginning, driven by digital technology and urbanization. This is giving rise to "urban villages" with the communal values and practices of villages but within modern cities. The economic advantages of density and new digital behaviors will create radical opportunities for "modern village economies" organized around mission-driven marketplaces, crowd-based platforms, and social software.