Community development in the age of social media

Today, more than ever before, artists, individuals, and organizations are using social media to make connections and spark conversations with each other. Art even happens online. Community building does too, according to this article on The Guardian. From mobilizing communities to act to providing a space for conversation and connections, social media is increasingly being used to support and sustain communities, in-person and away from computer screens. Do you see crossover between your online, social sphere and in-person action? How can, or do, online communities inspire physical communities?