What is online community? How has it evolved since the days of the electronic Bulletin Board through blogs, social media and online game? How will on evolve over the next 20 years with the evolution of social technology, mobile and wearable technology, augmented reality, big data, machine learning? What impact do online communities have on real-world communities? on buying behaviour? on politics and governance? How will the evolution of community impact our economy, democracy, the arts, and on consciousness itself?