Black Lives Matter (BLM) is a decentralized political and social movement advocating for non-violent civil disobedience in protest against incidents of police brutality and all racially motivated violence against black people.

In July 2013, the movement began with the use of the hashtag #BlackLivesMatter on social media after the acquittal of George Zimmerman in the shooting death of African-American teen Trayvon Martin 17 months earlier, in February 2012. The movement became nationally recognized for street demonstrations following the 2014 deaths of two African Americans: Michael Brown—resulting in protests and unrest in Ferguson, Missouri, a city near St. Louis—and Eric Garner in New York City.