We’ve seen a precipitous decline in participation in civic organizations in recent years; membership numbers are down for religious groups, labor organizations and non-profits. A cynic could interpret these trends as a sign that we have all become digital hermits, with our noses buried in our highly personalized screens. The reality is that powerful communities are not just alive and well but also booming. They just look different than they did 50—even 20—years ago. They are organized around businesses and brands and providing profound opportunities for companies around the world.