“In the last several years, the nature of mass demonstrations in the United States has changed, including the types of issues protested and people’s means of organizing mass demonstrations. People are often protesting police and police actions in addition to economic or social issues. Many demonstrations are no longer planned by established organizations; rather, demonstrations happen more spontaneously and quickly, as individuals interested in certain issues can easily find each other on social media. Demonstrators can also use cell phones to send live video coverage of demonstrations to viewers around the world.”
Source: Police Executive Research Forum (2018). Available from this link (open access).