From Hong Kong to Istanbul to New York, libraries are one of the defining elements of 21st-century demonstrations, says techno-sociologist Zeynep Tufekci, and they can help illuminate why people risk discomfort, arrest and danger to stand together.

In a democracy, power resides with the people. Here’s some helpful advice on how you can get your share, from civics educator Eric Liu.

Will the societal shocks of 2016 lead to a bumper crop of art in 2017 and beyond? These TED Fellows aim to channel the energy of activism into creative work that can change hearts and minds.